Show That You Understand the Concept of Retrosynthetic Analysis by Working

Multiple Choice

Show that you understand the concept of retrosynthetic analysis by working backwards two steps in the synthesis below. Identify possible combinations of A and B that can lead to the compound shown (C) :

A) B = I and A = VI
B) B = V and A = II
C) B = IV and A = VII
D) B = I and A = III
E) B = VIII and A = V