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. An optically active alkene (I) with lowest molecular mass on hydrogenation gives optically inactive alkene, but on insertion of methylene carbene ( : CH_2) in (I), it gives optically active compound (II). The compounds (I) and (II) are : .

Carbene intermediates are produced by the photolysis of diazomethane (

1.	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. An optically active alkene (I) with lowest molecular mass on hydrogenation gives optically inactive alkene, but on insertion of methylene carbene ( : CH_2) in (I), it gives optically active compound (II). The compounds (I) and (II) are : .
Answer» <P>P P,R P,Q, P,Q,R Solution :(C ) In `P` and `Q`, both `(I)` and `(II)` are OPTICALLY active.