Scientific advances over the last fifty yearshave ledto revolutionary changes in health, agriculture and communication, andgenerallyenhancingsocio-economic development and the quality of ourlives.

Choose the option that indicates the error in the sentence.

Solution (By Examveda Team)

The sentence begins with the verb phrase “have led to”, which is followed by a series of noun phrases describing results.

For correct grammatical structure, all parts joined by “and” must maintain parallel construction.

The phrase “generally enhancing socio-economic development” breaks this parallelism because “enhancing” is a present participle, while the earlier elements are governed by “have led to”.

To maintain parallelism, it should be “and generally enhanced socio-economic development”.

Therefore, the grammatical error lies in the word “Enhancing”, making Option C the correct answer.