As the war of words between BJP and Congress escalated, the opposition party claimed that Rahul lacked answers to "legitimate" questions and was, therefore, levelling false allegations at the Sangh Parivar.
"The election of 2014 is going to be fought on issues of 2014. Rising unemployment, country's growth rate coming down to an all time low, price rise and stinking corruption have strongly dented the very image of India leading to an utter sense of hopelessness in the country.
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"Legitimate questions are being asked from Rahul Gandhi as to what answer he has to all these. He has none. Therefore, to divert attention a completely false and mischievous allegation has been levelled by him about RSS involvement in the killing of Mahatma Gandhi," BJP leader Ravi Shankar Prasad told a press conference.
BJP has already moved the Election Commission against Rahul's remarks.
Prasad said various probes and an inquiry commission have not found the role of RSS in the assassination of Mahatma Gandhi.
The BJP's Deputy Leader in Rajya Sabha quoted a letter written by Sardar Patel to Jawaharlal Nehru in February, 1948, in which he had said that RSS was not involved.
"It was a fanatical wing of the Hindu Mahasabha that (hatched) the conspiracy and saw it through," Prasad quoted Patel as saying in the letter.
The letter is part of a biography on Patel written by Mahatma Gandhi's grandson Rajmohan Gandhi.
"Rahul Gandhi neither has an understanding of history nor his speech writers do their homework...Obviously Congress is desperate, dejected, has no enthusiasm or public support in the coming elections. A massive defeat is very much possible. Hence, this falsehood and deliberate mischievous campaign people are bound to reject," Prasad said.