I. Recently, there has been a lot of discussions on

Solution

Sentence I is incorrect as according to the Subject-verb agreement rule, the subject and the verb must agree in number, i.e., a singular subject must have a singular verb and a plural subject must have a plural verb, so, in this sentence, either ‘has been as lot of discussion’ or  ‘there have been a lot of discussions’ should be used. Sentence III is also incorrect as it is telling about the individuals’ data and activities, hence, this sentence needs an adjective. Thus, ‘captured’ which is an adjective should be used instead of ‘capture’ which is a noun.