Islam.
A Buddhist
No Islam and Buddhism are two fundamentally different religions.
This is simply definitional. A Muslim is, by definition, a follower of Islam, just as a Christian, by definition, is a follower of Christianity.
You are a Muslim if you a follower of the religion Islam.
Buddhism
I don't think anyone practices both Islam and Buddhism
Islam is the name of the religion & Muslim is the follower of Islam.
Muhammad, the founder of Islam, was a follower of the religion of Islam.
Christianity, Islam, Buddhism, Hinduism
The religion taught by Muhammad is called, Islam, which means submission to the will of God. A follower of Islam is a Muslim.
Islam.