Peace be upon you all >>>

i have a Q I wish you could give a help

my prof said that the word ( God )beginning with a capital letter related to the Christianity, so we shouldn't use it

another prof said that we can use it but beginning with a capital letter to refer to (Allah),

that god with small letter indicates to many (gods) rather than the one

which is the right one?

& THX

best wishes >>> C __ U