Sitting first seat at favorable vulnerability, I chose not to open this hand. LHO bids one spade, partner passes, and RHO bids 2 spades.
1) Is it reasonable for me to bid 2NT at this point, planning to correct diamonds to hearts?
2) Would that be a standard bid (ie, should partner think that would be a possibility beforehand, such that they would bid 3 clubs with a 4-2-4-3 hand)