Which of the following statements are true?
(A) The subsidiary quantum number \( l \) describes the shape of the orbital occupied by the electron.
(B) 
is the boundary surface diagram of the \( 2p_x \) orbital.
(C) The \( + \) and \( - \) signs in the wave function of the \( 2p_x \) orbital refer to charge.
(D) The wave function of \( 2p_x \) orbital is zero everywhere in the \( xy \) plane.
Choose the correct answer from the options given below:
