what is the sequence of shell , subshell, orbitals , orbits , electrons ?

Q. Which of the following options is/are correct for a shell having principal quantum number n = 5?

Q.

What is the difference between shells, subshells and orbitals??

Q. What is the total number of orbitals in the shell to which the $g$-subshell first arise?

Q. Identify the correct statements among the following:
(A) All orbitals in a shell are degenerate.
(B) Electron configuration of chromium violates Aufbau principle.
(C) Maximum number of unpaired electrons in 'f' subshell is 7.
(D) Maximum number of unpaired electrons in a subshell is 4$l$ + 1.

Q. The number of orbitals in the shell in which the h-subshell first arises is: