error in marital status inF2B immigrant visa be a cause of deportation?

my friend has error in immigrant visa for usa.his category is f2b .he is unmarried but in his visa it is incorrectly mentioned as married.should he proceed to usa without correcting or get it corrected in india.is there any chance of cancellation of visa at the consulate during correction .in all his documents he has mentioned his marital status as unmarried.