Select the correct passive form of the given sentence.
How many languages do you learn at school?

Correct option is C

The correct active/passive voice of the given sentence is (c).
Active voice: The subject performs the action.
Passive voice: The action is performed on the subject.
Structure:
Active: How many languages do you learn at school?
Passive: How many languages are being learnt by you at school?
Rule of conversion:
• Identify the object (“languages”) and bring it to subject place.
• Use the correct tense in passive – present continuous becomes “are being + past participle.”
Example: Are you reading the book? → Is the book being read by you?