SAT grammar question:
There are (more than) 300 million English speakers (in) India, most of (them) acquired English (as) a second language. (No error)
The parentheses designate areas where the grammar of the sentence may be incorrect. You have to select the area which is in error (or select "No error" if there is no error in the sentence).
(Them) is the error in the sentence.
Can someone explain why (them) is incorrect?