Which of the following gives the correct possible values of i for n = 4? a) 0,1,2,3 b) -4,-3,-2,-1,0,1,2,3,4 c) 0,1,2,3,4

The highest probability an electron resides in can be explained by 4 types of quantum numbers.
First is the principal quantum number - n, this is the energy level/ shell that electrons reside in.
Next is the angular momentum quantum number - l, this describes the subshells, the types of orbitals in the corresponding energy level.
values for l are from 0 to n-1
third is magnetic quantum number  - m - that gives the orientations of the orbitals and the specific orbitals in the subshells.
fourth is spin quantum number - s - gives the spin of the electrons in the orbital.

when n = 4, values of l are from 0 to n - 1
since n - 1 ---> 4 - 1 ---> 3
values of l are 0,1,2,3