Carbene intermediates are produced by the photolysis of diazomethane `(CH_2N_2)` or kenene `(CH_2 = C = O)`. They are also produced by the reaction of `CHX_3` with base or by Simmons-Smith reaction. There are two types of carbenes, singlet and triplet. They are so called due to their spin state.
In which reaction, the insertion of methylene increases potential energy ?

Options

A. `CH_(2) = CH_(2) +:CH_(2) rarr CH_(3) - CH =CH_(2)`
B.
C. `Me-Ch=CH_(2)+ :CH_(2) rarr Me-CH=CH-CH_(3)`
D.

Answer

B

Explanation

(b) Due to ring strain in cyclopropane