What was written on seal of the Holy Prophet (PBUH)?

حضور کی مہر پر کیا لکھا تھا۔

Allah, Rasool, Muhammad

Muhammad, Rasool, Allah

Rasool, Allah, Muhammad

All of these

Mohammedﷺ had a seal made of silver, with the words "Allah - Rasool - Muhammad".

Islamic official seal started in 7 A.H

The seal affixed on important letters by the Prophet (SAW) was in the Custody of Hazrat Huzaifa (RA).