The President today______ the committee with the induction of the five new general secretaries in place of those dropped.

When you review something, it is merely a study, not an action (implementation). But induction is an action. So we reject (2). Again, the committee already existed, otherwise how could five persons have been dropped. And you dont form that which already exists. So (3) is rejected. (4) is rejected because enlarging would only involve induction, no dropping. Similar is the case with supplemented (5). Since it involves both adding (induction) and dropping, it is a reconstitution forming it again.