In these questions some parts of the sentences have error and some have none. Find out which part of a sentence has an error and correspoding to the appropriate letter (a,b,c). If a sentence is free error , your answer is (d).
`("Some categorically suspected")/a` `("having seen the")/b` `("gaurd and thief together")/c` `("No error")/d`.

Explanation

(a) Put .have. before .categorically.