Passive form of `Do you know them?` is-
Are they known by you?
Are they known to you?
Were they known to you?
Is they known to you?
Explanation:
Correct Answer is: Are they known to you?
………know them? এর passive হলো Are they known…..?
Are they known by you?
Are they known to you?
Were they known to you?
Is they known to you?
Correct Answer is: Are they known to you?
………know them? এর passive হলো Are they known…..?