The set of principal $\left(n\right)$ azimuthal $\left(l\right)$ and magnetic $\left(m\right)$ quantum numbers that is not allowed for the electron in H-atom is

Q. which of the following set of quantum numbers is not possible
a. n=3, l=1, m=+2
b. n=3, l=1, m=+1
c. n=3, l=0, m=0
d. n=3, l=2, m=+2

Q. In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?
i) $n=1,l=0,m=0$
ii) $n=2,l=0,m=0$
iii) $n=2,l=1,m=1$
iv) $n=3,l=2,m=1$
v) $n=3,l=2,m=0$

Q. Consider the following sets of quantum numbers.

Q. The set of principal $\left(n\right)$, azimuthal $\left(l\right)$ and magnetic $\left(m_l\right)$ quantum numbers that is not allowed for the electron in $H$-atom is: