In the following questions, some parts of the sentences have errors and some have none. Find out which part of a sentence has an error. The number of that part is your answer. If a sentence is free from error, then your answer is (4), l.e. No error.
Our history can be seen as a long evolutionary dialectical development (1)/ in which there have been (2)/ a painstaking forging of rational and moral self (3)/. No error (4)

Answer

2

Explanation

Here , in which there has been (singular) hould be ued .