Read each sentence to find out whether there is any grammatical mistake/error in it. The error if any will be in one part of the sentence. Mark the number of the part with error as your answer. If there is 'No error' mark(d).
`("He wondered that what ")/a` `("would be the next move of his opponents")/b` `("who had vowed to see him dislodged from power? ")/c` `("No error")/d`.

Explanation

(a) Remove .that.