How to solve this question

Dear Student, This question is of higher level (Biology AIPMT) but you have posted this question in lower level (Chemistry 11-12). As I'm not getting option here to change your subject as Biology AIPMT because you have not posted this question in higher grade. Please retag and repost in correct grade (Biology AIPMT). So that our experts provide you with some meaningful help. Looking forward to hear from you soon. Regards.