Drawing a comparison between the 2G spectrum allocation scam and the Coal allocation controversy, Leader of Opposition in Rajya Sabha Arun Jaitley told reporters that while in the former, Singh was politically and "vicariously" responsible, in the latter he is directly involved.
"The only way to break the deadlock in Parliament is if the Prime Minister takes responsibility (for the coal scam) and acts accordingly," Jaitley said.
The BJP leader maintained that Singh was directly complicit in the coal allocation case- in which the CAG has said there was an estimated loss of Rs 1.86 Lakh crore- as he held the Coal Ministry portfolio for five of the last eight years of UPA rule.
"There is no way that he can escape responsibility for this monumental loss," Jaitley said.
BJP contended that the decision to go for auction of coal blocks was taken in 2004 but it has not been implemented till now though eight years have passed.
It has refuted the Centre's contention that this delay was caused as some of the states were opposed to auction, saying Coal comes under the Centre List and states have no say.
The main Opposition has alleged this delay has helped some companies make "windfall gains" in these years.
