-  say was exiled

The given sentence is grammatically correct, and there is no error in it. Let's analyze each part of the sentence to understand why.

• "After" is a preposition used to indicate a period of time following an event or situation. It is correctly used in the sentence to denote the time frame after Napoleon's defeat at the Battle of Waterloo.

• "Had lost" is the past perfect tense of the verb "lose," used to indicate an action that was completed before another action in the past. In this sentence, it correctly describes the event of Napoleon's defeat at the Battle of Waterloo, which happened before his exile to St. Helena.

• "Had been exiled" is the past perfect passive tense of the verb "exile." It correctly describes the action of Napoleon's exile, which was completed before another action in the past (his death). The use of the past perfect tense in this sentence emphasizes the completed nature of the action.

• "No error" is the correct answer because there is no grammatical error in the sentence.

• The sentence is complete and makes sense as written. The absence of a conjunction or other connecting word between the clauses is not an error because it is a valid grammatical construction known as a comma splice. In this sentence, the comma splice is used to connect two closely related clauses and give the sentence a sense of continuity.

In conclusion, option D is the correct answer as there is no error in the given sentence.

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