The orbit angular momentum of 3d and 4d are:

Explanation

To find the orbital angular momentum of the 3d and 4d orbitals, we can follow these steps:

### Step 1: Understand the formula for orbital angular momentum
The orbital angular momentum (L) is given by the formula:

\[ L = \sqrt{l(l + 1)} \cdot \frac{h}{2\pi} \]
...