On Board, Oct 24, (ANI): Talking about the speculations on involvement of the PM in the infamous Coal Allocation Scam, while returning from his five-day visit to Russia and China, Prime Minister Manmohan Singh said that he has "nothing to hide" and that he will abide by the instructions of CBI and that CBI can carry on its investigations. Further, talking about the upcoming 2014 general elections, Singh said that Congress which is surrounded by scams will surprise the nation again and will come to power.