Each question in this section has sentence labelled as (a), (b) and (c) . Read each sentence to find out whether there is any error in any of the part . If you find no error , your aswer should be indicated as (d).
`("There are a number of people")/a` `("of every class and nationally ")/b` `("who doubts the truth of his statement")/c` `("No error")/d`.

Explanation

(c) Replace .doubts. by .doubt.