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).
`("The distinguished visitor said that he had great pleasure to be with us for some time")/a` `("and that the pleasure was all the greater")/b` `("because his visit afforded him an opportunity to study the working of an institution of such eminence as ours.")/c` `("No error")/d

Explanation

(c) Ass .that of. before .ours.