Advani also used Rajmohan's writing in his book on Sardar Patel to bring home the point that the country had not given "due recognition" to the role of country's first Home Minister in the formative years of post-independence India.
Quoting a letter written by the then Home Minister Sardar Vallabhai Patel to then Prime Minister Jawaharlal Nehru in February 1948, Advani said, the various probes had found no link between RSS and Gandhi's assassination.
The BJP leader's remarks came days after BJP moved the Election Commission against Rahul Gandhi for his remarks that RSS was behind the assassination of the Mahatma.
As the war of words between BJP and Congress escalated over the issue, Advani said, Rajmohan's book has "effectively nailed the Congress's slanderous campaign against the RSS in respect of Mahatmaji's assassination."