The principal opposition party also charged the Congress-led UPA government with doing precious little for bringing back black money, attacking Law Minister Kapil Sibal for not taking even a single initiative in this regard while dubbing him as "the biggest patron of crony capitalism in India" for defending the 2G accused.
Raking up again the issue of Robert Vadra's land deals, the party sought an answer from Sonia Gandhi and Rahul Gandhi "under which entrepreneurial ability by investing a few lakhs of rupees one can become an owner of Rs 300 crore."
Hitting out at Sibal, who raised the issue of black money generated in Gujarat through illegal liquor trade, the BJP leader said the Law Minister talking of blackmoney is curious.
"Kapil Sibal is the biggest patron of crony capitalism in India, the way he has defended the 2G accused and said there has been no corruption in allocation of 2G spectrum," he said.
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The BJP leader also accused the Finance Ministry of doing nothing to bring back black money even when smaller nations had taken major initiatives in this regard.
Prasad also charged Sibal with being part of a government where there has been "organised corruption and loot".
The Law Minister also suggested that it was this black money that was used for the aggressive poll campaign by the BJP Prime Ministerial candidate in the Lok Sabha polls.
Asked about issue of BJP candidate Mahant Chandnath and yoga guru Ramdev being caught on camera talking about money in polls, Prasad defended Ramdev saying he has not said anything wrong.
On the BJP candidate, he said, he will himself explain his position. Asked about Ramdev's relation with BJP, he said, though he is not a BJP member, he has been a party sympathiser.