S-I: Propene and cyclopropane both give addition reactions only
S-II: Propene and cyclopropane are ring chain isomers.

Options

A. S-I & II are correct, S-II is correct explanation of S-I
B. S-I&II are correct, S-II is not correct explanation of S-I
C. S-I is true, but S-II is false.
D. S-I is false, ut S-II is true

Answer

D