Ask the Muslim where His blood comes from. Then ask why they believe in the virgin birth of Jesus, then ask where did His blood come from. They cannot answer.
She(Mary) said: "O my Lord! How shall I have a son when no man hath touched me?" He said: "Even so: God createth what He willeth: When He hath decreed a Plan, He but saith to it, "Be", and it is!
My blood comes from the food i eat