Is it possible to do post graduate course under delhi or cal univ after doing a correspondence course?

if i opt for a correspondence under graduate course under IGNOU in english, will it be possible to opt for a post graduate course under delhi or calcutta university?? and also, can anyone please suggest me the best place for doing correspondence course in psychology and english and what will be the future pors and cons of after tis UG course....i need REAL help..Thanks guys!!