Select the option that expresses the given sentence in passive voice.
Access denied.

Correct option is A

The correct option to express the sentence in passive voice is (a) " Let the access be denied."
Active Voice: In Active voice the subject is the one doing the action.
Passive Voice: In Passive voice the subject is the recipient of the action.
Many times, we notice that who has completed the work is not mentioned in active voice or is ambiguous i.e. one, someone, people, they, circumstance, and so on is used as a subject depending on the situation.
When we change the active voice into the passive voice, we can omit the subject and there is no particular rule to selecting the subject.
If someone gives a command, requests, expresses or desires a wish the sentence is called an Imperative sentence.
To change an imperative sentence into passive voice the structure would be:
V1+ Object. (Active voice)
Let+ subject+ be+ V3. (Passive voice)