Which of the following orbitals are possible ?
`1p, 2s, 3f, 3d`

Explanation

To determine which of the given orbitals (1p, 2s, 3f, 3d) are possible, we need to analyze each orbital based on the principal quantum number (n) and the azimuthal quantum number (l).

### Step-by-Step Solution:

1. **Understanding Quantum Numbers**:
- The principal quantum number (n) indicates the energy level or shell.
- The azimuthal quantum number (l) defines the subshell and can take values from 0 to (n-1).
- The values of l correspond to different types of orbitals:
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