' We must yield to our fate' the negative of sentence is-

A We cannot but yield to our fate

B We cannot but yielding to our fate

C We cannot help to yield to our fate

D We cannot go to yield to our fate

Correct Answer: Option A

এখানে We cannot but yield to our fate হচ্ছে সঠিক।
কারণ must এরপরে can not but + Verb এর present form বসে অথবা cannot help + verb এর ing হয়।

Source: Advanced Learner's Grammar and Composition by Chowdhury and Hossain