Read the below 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).

After carefully examining (1)/ all the medicine bottles (2)/ he submitted a detailed report (3) to the higher authorities. (4)/ No error (5).