Singh, whose government has been facing attack on the issue of corruption, admitted that it was an issue and AAP had been able to "make success out of their concerns of eradication of corruption".
"People of India have reposed confidence in the AAP party in Delhi. I think we must respect the democratic process," he said while responding to a question on AAP's electoral success in the national capital.
AAP led by Arvind Kejriwal bagged 28 out of 70 seats in the just-held Delhi assembly elections, riding on its main plank of fight against corruption and price rise.
Singh said dealing with corruption was not an easy task and various political parties will have to work together to fight it.
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On the issue of price rise, he conceded that it could have been a factor in Congress' defeat in the assembly polls.
He said he had tried to serve the country with utmost commitment and dedication and had not used his office to reward any of his friends or relatives.