Read the sentence to find out whether there is an error in it. The error, if any, will be in one part of the sentence. The number corresponding to that part will be your answer. If the given sentence is correct as it is, mark the answer as 'No error'. Ignore the errors of punctuation, if any.
Customers of the museum are (1)/ in the processing of collecting and (2)/ preserving unique masks and (3)/ face shields from the current ones. (4).

Options

A. 2
B. 3
C. 4
D. 1

Answer

A