Which will not show geometrical isomerism ?

Geometrical isomerism is exhibited by the compound which possess the double bond In this type of compound, rotation is restricted. Compounds having either C=C or C=N exhibit geometrical isomerism as different groups are present at the double bond. The geometrical isomerism is shown below- However, in ketoxime, 3 2 (CH ) C NOH , two same 3 CH groups are present on double bonded carbon atom. This is why, it does not exhibit geometrical isomerism. Thus, the correct option is (d) 3 2 (CH ) C NOH . 19. Which will exhibit geometrical isomerism ? (a) 3-phenyl-1-butene (b) 1-phenyl-2-butene (c) 2