4 Answers
Please see below link for 40, please comment back if still there is doubt
https://auditguru.in/question/app-based-mcq-page-13-q-40zonal-co-sir-please-explain-the-reason-for-option-a-and-why-not-d/
bt thn sir on the basis of explanation we could have selected option c as the answer
i feel there is bit ambiougity in the question so i that case how should we proceed to select correct option