(A) : The energy of electrons is largely determined by its principal quantum number.
(R) : The principal quantum number is a measure of most probable distance of finding the electron around the nucleus

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true

Answer

A