It is time to ring the bell. (Change to present continuous tense)

It is being time to ring the bell.

It is time for the bell to ring.

It is time for the bell to be rung.

None of these

It is time for the bell to be rung.

Given sentence is in present continuous tense and it is in active voice.

Rule :

Subject + (is/am/are) + to be + V3