They greet me cheerfully every morning.

Every morning I was greeted cheerfully

I am greeted cheerfully by them every morning

I am being greeted cheerfully by them every morning

Cheerful greeting is done by them every morning to me

None of these

This is a sentence of Present Indefinite Tense.

The formula of Passive Voice for Present Indefinite Tense to Passive Voice: Object + is/are/am + III form of verb + by+ subject.