Match the reactions in Column I with appropriate types of steps/reactive intermediate involved in these reactions as given in Column II :

	Column I		Column II
(A)		(P)	Nucleophilic substitution
(B)		(Q)	Electrophilic substitution
(C)		(R)	Dehydration
(D)		(S)	Nucleophilic
		(T)	Carbanion

In the reaction

the products are :

A tertiary alcohol H upon acid catalysed dehydration gives a product I. Ozonolysis of I leads to compounds J and K compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M.

Compound H is formed by the reaction of