Chemistry · Structure of atom

Consider the following statements regarding the characteristics of orbitals and wave functions:\n(A) The probability density \( |\psi|^2 \) is always positive.\n(B) For \( 1s \) orbital, the probability density is maximum at the nucleus and decreases sharply as we move away from it.\n(C) Boundary surface diagrams for three \( 2p \) orbitals are spherical in shape.\n(D) The number of nodal surfaces for \( ns \)-orbital is equal to \( n - 1 \). \nWhich of the above statements are correct?

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