MUMBAI: The Narula brothers Achin and Sarthak , became the first ever contestants to win the highest prize of Rs 7 crore in reality game show 'Kaun Banega Crorepati' , hosted by Bollywood megastar Amitabh Bachchan.The Narula brothers, who hail from Delhi, emerged victorious after answering all the 14 questions correctly with the help of four lifelines.Achin is a marketing manager and Sarthak is a student. Achin has been trying to be a part of the iconic show for the last 10 years but always fell short of being selected for the fastest finger first contest.Bachchan, 71, hinted about the big win on his official blog and Twitter handle while posting his pictures from the show.He wrote, "It is a topsy turvy world tonight and KBC is the one that needs to be blamed!! What incredible moments, what brilliance and what an incredible play ...! That is all I am permitted to say.""The beauty and the excitement of KBC at its very maximum! Just an incredible moment," Bachchan tweeted, followed by a photograph from the sets of the show featuring the winners."Bazuumbaaa," the actor posted along with the snap adorned with the Rupee symbol.Bollywood megastar Amitabh Bachchan on the sets of KBC with the contestants.Bachchan, who has been hosting the show for 14 years, was reportedly speechless as the brothers made it to the top prize.Siddhartha Basu, who is the producer of the show, said the jackpot win was a moment to cherish."We have been waiting for a moment like this since the inception of this show. It is a pleasure to see bright brains like Achin and Sarthak battle it out for the Maha Jackpot."Amitabh Bachchan with a contestant on the new sets of new season of KBC.Gaurav Seth, senior vice-president marketing, Sony Entertainment Television called the win a "momentous occasion" while congratulating the brothers on their win.