Answer: Option C. -> Circumstances obliged him to resign.
Answer: (c)

Answer: Option C. -> By whom was the fair inaugurated?
Answer: (c)

Answer: Option A. -> His teacher congratulated him on his brilliant success in the recent examination.
Answer: (a)

Answer: Option B. -> Why wasn't the matter brought by you to my notice?
Answer: (b)Why didn't you bring the matter to my notice? (a) Why isn’t the matter brought by you to my notice? (Tense has changed) (b) Why wasn't the matter brought by you to my notice? (Correct) (c) Why isn't the matter brought to my notice? (Tense has changed) (d) Why wasn’t the matter brought to my notice? (By you is missing)

Answer: Option D. -> The shock was borne bravely by most people.
Answer: (d)Most people bore the shock bravely. (a) The shock was bore bravely by most people. (Third form of the verb not used) (b) The shock was born bravely by most people. (Incorrect word) (c) The shock was to be borne bravely by most people. (Incorrect) (d) The shock was borne bravely by most people. (Correct)

Answer: Option D. -> The bank will sanction the loan.
Answer: (d)

Answer: Option A. -> English is spoken all over the world.
Answer: (a)

Answer: Option B. -> By whom can Gandhi’s integrity be questioned ?
Answer: (b)

Answer: Option C. -> These days most of the assignments are done with the help of the internet by the students.
Answer: (c)These days most of the students do their assignments with the help of the internet. (a) These days the assignments are being done with the help of the internet by most of the students. (Tense has changed) (b) These days the assignments were being done with the help of the internet. (by the students hasmissing) (c) These days most of the assignments are done with the help of the internet by thestudents. (Correct) (d) These days most of the students are doing their assignments with the help of the internet.(Tense has changed)

Answer: Option D. -> Quinine is tasted bitter.
Answer: (d)