The m value not possible for a double dumbbell-shaped orbital is
Explanation for correct option
(D)
D-orbitals
m-value for double dumbell
Explanation for incorrect option
The possible value of m for double dumbbell-shaped orbital is . Hence, options (A), (B), and (C) are incorrect.
Hence, option (D) is correct. The m value not possible for a double dumbbell-shaped orbital is .