Which of the following statements are correct?

$(A)$ The electronic configuration of $Cr$ is $[ Ar ] 3 d ^{5}$ $4 s^{1}$.

$(B)$ 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 are given by $n-2$.

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