Directions: The given sentence is underlined in three separate parts and each one is labelled as (a), (b) and (c). Read the sentence to find out whether there is an error in any underlined part. The part containing the error is the answer. If there is no error in any part of the sentence, mark (d) as your answer.

Some discussion is going on (a)/ among the (b)/ two groups of the society. (c)/ No error (d)