100 milliamp coil current...transistor or MOSFET?

Hey thank you for the input.

I should have stated a small transistor (2pn2222) vs. mosfet.

The relays can handle up to 10amps but I am only going to draw <1 amp.

So I will use the small transistor and use a smaller resistor between the middle pin and the arduino pin lets say 300 Ohms?

Thanks again !