Spotting Errors in English

• 1. Spotting errors in English
  

  1. We had a lot
  2. of difficulty
  3. to find the
  4. address told by him.

  Answer :

  Option C

  Explanation:

  Correct : We had a lot of difficulty in finding the address told by him.
  
  Replace "to find" with "in finding" in option B