"Some people had raised questions about the language used by Prashant Bhushan. We apologise for that. There's the difference of opinion on Prashant Bhushan's 'Shikhandi' remark in Team Anna," he said.
According to Team Anna, the allegations were levelled based on a CAG report, which threw light on irregularities in the allocation of coal blocks, when PM Singh held the coal portfolio.
"There is no need for a change in the law to auction coal blocks but the Prime Minister's Office insisted and proceeded with giving away the coal blocks. This has led to huge loss to the country," said Arvind Kejriwal.
"We would be happiest if the allegations against the Prime Minister are proved wrong. But for this, there should be an investigation. According to CAG report, there has been a scam. The Prime Minister may not have been the beneficiary but someone has taken the benefits and that needs to be Probed," he added.
Meanwhile, another Team Anna member, Manish Sisodia added fuel to the already raging controversy by saying that he deserved to spend the rest of his life in jail rather than quitting public life if the allegations against him were proved.
PM Singh said that he would leave public life if found guilty.
"Why is the Prime Minister avoiding probe in the coal scam? The Prime Minister says if the allegations are proved, he will quit public life. Why doesn't he say that he will spend the rest of his life in prison if the scam is true? This means the Prime Minister is confessing that politicians can evade and live a life of luxury despite carrying out huge corruption," said Manish Sisodia.
"I will give up my public life if allegations are proved against me. My long public career as Finance Minister, as Leader of Opposition in the Rajya Sabha and now as Prime Minister has been an open book," said Prime Minister Manmohan Singh.