identify the correct structures ,also mentioned reason for being wrong for other structure.

11. C,H,N 100 T 80- 1321 40 1433 20 3500 3000 2500 2000 1500 1000 500 4000 Wavenumbers 12 CH,N 100- 80 60 20 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers * ---CRE--- coe