In the following question, a sentence has been given in Direct/Indirect form. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct form.
'Many happy returns of your birthday', we said.

• We greeted him on his birthday.

• We said that many happy returns of your birthday.

• We wished him many happy returns of his birthday.

• We prayed for many happy returns of his birthday.