Chemistry · Structure of atom

Consider the following statements about quantum rules and orbitals:\n(A) The principal quantum number \( n \) defines the main shell and size of the orbital.\n(B) For a given value of \( n \), there are \( n \) allowed values of \( l \).\n(C) The number of \( m_l \) values for a given \( l \) is \( 2l + 1 \).\n(D) The total number of electrons in a given subshell is \( 2l + 1 \). \nWhich of the above statements are correct?

1. A
   (B) and (D) only
2. B
   (A), (B) and (C) only
3. C
   (A), (C) and (D) only
4. D
   and (D) only