Official Solution:
Forgetting is an act of willful repression, unlike in Amnesia one is unaware of having forgotten.
A. Forgetting is an act of willful repression, unlike in Amnesia one is unaware of having forgotten.
B. Unlike in Amnesia, in which one is unaware of having forgotten, forgetting is an act of willful repression.
C. Whereas in Amnesia one is unaware of having forgotten, forgetting is an act of willful repression.
D. Unlike Amnesia, in which one is unaware of having forgotten, forgetting is an act of willful repression.
E. Forgetting is an act of willful repression, whereas Amnesia in which one is unaware of having forgotten.
To maintain parallelism, a contrast is required to be drawn between the two nouns “Forgetting” and “Amnesia”.
A. Parallelism is lost because a noun (“Forgetting”) is contrasted with a prepositional phrase (“in Amnesia”).
“Unlike” should be followed by a noun, whereas in this option “unlike” is followed by a clause (“in amnesia one is unaware of having forgotten”). For contrasting two clauses “whereas” is better.
B. Parallelism is lost because a noun (“Forgetting”) is contrasted with a prepositional phrase (“in Amnesia”).
C. Although “whereas” correctly joins two clauses in this option, the parallelism is broken because the contrast is wrongly set up between a prepositional phrase (“in Amnesia”) and a noun (Forgetting”).
D. CORRECT. A contrast has been set up between the two nouns “Forgetting” and “Amnesia”, maintaining the parallelism.
E. “Whereas” is followed by an incomplete clause, i.e. only a noun “Amnesia” and a noun modifier (“in which one is unaware of having forgotten”) - there is no verb for the subject “Amnesia” making the clause incomplete.
Answer: D