Identify 'A' and 'B' in the following.

Identify D, E and R' in the following :

Identify A, B and C In the following reaction : C_6H_5CH_2_OH overset(PC C)(rarr) A overset (NaOH)(rarr) B+C

Identify A, B, in the following :

Identify the product in the following reaction.

Identify 'C' in the following reaction:

Identify the product in the following reaction. , ,

(b)Identify the quantifier in the following statement:There exists a real number which is twice of itself.