Correct Answer - B
Symmertical carbony`1` compounds form oximers which cannot exists as cis-trans isomers while unsymmetrical carbony`1` compounds reat with `H_(2)NOH` to give two oximes (syn and anti).
The simplest ketone, acetone, is symmeterical and froms only one oxime:
The next higher homologue, butan`-2-`one, is unsymmetrical and thus forms two oximes (syn and anti):
