Which statement is incorrect about peptide bond?
| A. |
C-N bond length in proteins is longer than usual bond length of C-N bond |
 |
| B. |
Spectroscopic analysis shows planar structure of `-underset{underset{O}{||}}{C}- NH -` bond |
| C. |
C-N bond length in proteins is smaller than usual bond length of C-N bond |
| D. |
None of these |