Question

Which of these are correct base pairs in DNA

Answer 1

You didn't list any pairs, but DNA does not include U. If it contains U, then it is a mRNA strand.

Therefore, to figure out which strand is DNA, find the strand with the base pairs of ATGC.

Hope this helps!

Answer 2

The correct pairing of DNA pairing base is 

A is paired to T ,T is paired to A

C is paired to G,G is paired to C

The correct pairing for RNA base is 

A is paired to U,U is paired to A

C is paired to G,G is paired to C

but is you a T as your DNA strand A is the pair in