In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
Ann received the promotion instead of Susan (A)/ as Ann is senior than Susan in age (B)/ though Susan had worked there before Ann. (C)/ No error (D)

Answer

2

Explanation

It is Preposition related error.
The words superior, senior, junior, prior, etc. take to and not
than
Hence, as Ann is senior to Susan in age is the right usage.