Correct order of indicated bond length is/are:
A. `CH_(2)overset(a)=CH-O"Me" lt O_(2)N-CH_(2)overset(b)=CH-O"Me"`
B.
C. `CH_(3)CH_(2)ul(a)Cl lt CH_(2) =CH-CH_(2)ul(b)Cl`
D. `CH_(3)-underset(O)underset(||)Cul(a)OH lt CH_(3)-underset(O)underset(||)Cul(b) O^(Ѳ)`
