"We all know that exit polls have gone wrong in the past, and this will happen now again," he said, talking to PTI here.
Asked how many seats he expected Congress to win, Singh said: "At least one hundred."
He added that exit polls could go wrong because of a number of factors, including the fact that they are based on responses of very few.
"In a state where crores of people cast their vote, you cannot make any assessment simply by talking to a few thousand persons," the Congress general secretary said.
Asked what he thought of the exit polls' prediction that Samajwadi Party could even get an absolute majority on its own, Singh said, "Impossible."