EDUCATION AND ENTERTAINMENT

"Kaun Banega Crorepati,popularly known as KBC is an Indian reality/game show based on the UK game show ""Who Wants to Be a Millionaire?"" The show first aired in 2000 and was hosted by Amitabh Bachchan. This was the first appearance of Bachchan on Indian television. The show is hugely popular in India.
The fourth season (popularly known as KBC4) was hosted by Amitabh Bachchan and started on October 11, 2010, on Bachchan's 68th birthday. The fourth season of the show was highly successful due to the return of former host Amitabh Bachhan. The season ended on 9 December 2010.
Contestants must undergo an initial round of ""Fastest Finger First"", in which the host introduces the ten contestants of the episode and asks them all the same question. The contestants must then arrange the answers in the order described in the question. The contestant that places the four options in the correct order in the fastest time gets the chance to go on the ""hotseat"".
At the hotseat, the contestant is asked a series of general knowledge questions consistently rising in difficulty with every question. Each question has four options with only one correct answer. The contestant wins a certain amount of money with each correct answer, and may choose to give up and retain the money they have already won if they decide not to answer the currently shown question.
The money won after each question is roughly doubled from the previous amount won, exponentially increasing the amount won after each correct answer until the contestant reaches the final question, after which they win the maximum prize (currently 5 crores in KBC 4)
Lifelines
A contestant can use a lifeline when he/she is undecided about which answer is correct. A lifeline can only be used once. The current lifelines in KBC4 are the same as KBC3 with the only difference being the ""Fifty-Fifty"" lifeline replaced by ""Double Dip"" and ""Flip The Question"" lifeline replaced by ""Expert Advice"".Audience Poll: If the contestant uses this lifeline, it will result in the host repeating the question to the audience. The studio audience get 10 seconds to answer the question. Audience members use touch pads to designate what they believe the correct answer to be. After the audience have chosen their choices, the results are displayed to the contestant in percentages in bar-graph format and also shown on the monitors screens of the host and contestant, as well as the TV viewers.
Phone a Friend: If the contestant uses this lifeline, the contestant is allowed to call one of the three pre-arranged friends, who all have to provide their phone numbers in advance. The host usually starts off by talking to the contestant's friend and introduces him/her to the viewers. After the introduction, the host hands the phone call over to the contestant who then immediately has 30 seconds to ask and hope for a reply from their friend.
Ask an Expert: This lifeline allows the contestant to ask an expert via live face-to-face audio and video connection. The expert could be anyone from a celebrity to a previous Millionaire contestant. Ask the Expert is available throughout the game. There is no set time limit, and the contestant and expert are allowed to discuss the question.
Double Dip: This lifeline allows the contestant to make two guesses at a question. This lifeline is available after the contestant correctly answers the seventh question. A second incorrect answer results in a loss and the contestant's winnings dropping back down to the last milestone achieved. This lifeline differs from others in that - once the player has chosen to use this lifeline, he/she has to answer the question. There's no way the player can leave the seat without answering the question.
Former lifelines
Fifty-Fifty (50/50): If the contestant uses this lifeline, the host will ask the computer to randomly remove and eliminate two of the ""wrong"" answers. This will leave one right answer and one wrong answer, resulting in a situation of eliminating 50% of the choices as well as having a 50% chance of getting the answer right if the contestant is in a situation of making a guess. In 2010, 50/50 was replaced by Double Dip.
Flip the Question: The contestant earned this lifeline upon answering the fifth question. The computer replaced, at the contestant's request, one question with another of the same monetary value. Any lifelines used on the original question prior to the switching were not reinstated."