I am trying to use the grill mode in my microwave oven. I would like to know what type of utensil can be used in it? Steel/microwave safe etc
If you're lucky, the owner's manual is clear or there's a "microwave on/off" type button that you can use to make sure that no microwaves are used while in grill mode.
If in doubt, you have to assume that the microwave still uses microwaves when in convection or grill mode, since many definitely do. That means you need microwave safe dishes (generally, no metal).
Or else, you can test by simply boiling some water. Try in normal microwave mode, see how long it takes to boil, then try the same setup in grill mode. If it takes substantially longer (or you get bored before it starts boiling), it's probably not using microwaves, so you can use whatever heat-safe dishes you want in grill mode. If it boils just as fast, it's using microwaves, and you need microwave-safe dishes.
(I suppose if you're reckless/impatient, you could also test by putting some aluminum foil in, be ready to quickly stop it, and just seeing if it sparks/catches on fire...)