Which of the following statements are correct?
$(A)$ The electronic configuration of $Cr$ is $[Ar] 3d^5 4s^1$.
$(B)$ The magnetic quantum number may have a negative value.
$(C)$ In the ground state of an atom, the orbitals are filled in order of their increasing energies.
$(D)$ The total number of nodes is given by $n-1$.
Choose the most appropriate answer from the options given below.

• A
  $(A)$, $(C)$ and $(D)$ only
• B
  $(A)$ and $(B)$ only
• C
  $(A)$ and $(C)$ only
• D
  $(A)$, $(B)$ and $(C)$ only