Directions: Read the sentence to find out whether there is any error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is no error, the answer is (5). Ignore errors of punctuation, if any.

He was enough stupid to believe in his co-passenger /(A) and entrusted him to look after his luggage while he went /(B) to the washroom. Later it turned out that his co-passenger is /(C) a notorious robber and is on the hit list of the police. /(D)