Congress President Rahul Gandhi led a protest of party MPs at the Parliament over Rs 12,600-crore Punjab National Bank (PNB) fraud and questioned Prime Minister Narendra Modi's silence over it.Senior Congress leaders Ghulam Nabi Azad, Mallikarjun Kharge and A.K. Antony were present at the protest near the Mahatma Gandhi statue.Gandhi tweeted in Hindi: "Sansad mai aaj ek jordar nara sunai par raha hai: Nirav Modi, Modi Nirav" (A superb slogan can be heard in Parliament today: Nirav Modi, Modi Nirav)."Ek Nirav Modi hai, dusra Modi nirav hai" (One of them is Nirav Modi and the other Modi is silent).