which bond is the most polar? 1.) C-C 2.) C-H 3.) N-H 4.) 0r C-N?

Answer 1

No it's not.

C-C is non-polar (equal pull on each C)
Due to the strong electronegativity of C and N in the remaining bonds, they are all polar.

In order of strength (strongest polar bond first):
N-H, C-H, C-N, C-C

Answer 2

The N-H bond is the most polar because it has hydrogen bonding. H bonded to N, O, or F forms strong, polar bonds. The other ones are nonpolar.

Answer 3

The N-H is the only polar one of all you've listed