Answer:
The passive form of the given sentence is,
Who is being selected by you for this post?
Explanation:
The given interrogative sentence is,
Whom are you selecting for this post?
It has been told to change the voice of the sentence from active to passive.
Active voice:
In the active voice of the SVO pattern, the subject which is doing a particular action or verb comes first.
Passive voice:
In the passive voice of the SVO pattern, the subject which comes first receives the verb or action done by the object.
Active to passive:
To change a sentence from active to passive form, just rearrange the words given.
Put the object in place of the subject and the subject in place of the object.
That is, from SVO to OVS.
Add the word 'by' as a conjunction to the object.
While converting, do not change the tense (past, present, or future) of the given sentence.
Change only the verb form according to the tense given.
Changing the voice:
In the given sentence,
The subject is 'Nobody', which is doing the action.
The verb is 'called', which is the action done by the subject.
The object is 'the police', which is receiving the action.
Active voice:
Whom / are / you / selecting / for this post?
S V O
(Consider both verbs are + selecting.)
Passive voice:
Who / is being selected / by you / for this post?
S V O
This is the passive form of the given sentence.