My mother mustn't be disturbed.
A. You mustn't disturb my mother.
B. You shouldn't disturb my mother.
C. You must be disturbing my mother.
D. You have disturbed my mother.
Answer: Option A
Solution (By Examveda Team)
You mustn't disturb my mother.The given sentence contains one of Model verb (Model Verb = will, shall, can, may, might, could, might, must, would). It is in passive voice.
Rule :
Subject + Model verb + V1 + Optional Objects

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