hey mrityunjay 

there are lots of factors which decides which is a better college .overall these two colleges are very good and a very good choice to take admissions . the fees of lucknow christian college is less then national pg college . the placement is also quite good .but if have to chose in between i will prefer national pg colllege .as it is one of the best colleges in up .its ranking is very good and placement is also very good .however you should compare them more on teh basis of what you want