In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric field?
1) `n=1, l=0, m=0`
2) `n=2, l=0, m=0`
3) `n=3, l=1, m=1`
4) `n=3, l=2, m=1`
5) `n=3, l=2, m=0`

Explanation

To solve the question, we need to determine which orbitals, described by their quantum numbers, have the same energy in the absence of magnetic and electric fields. The key concept here is the degeneracy of orbitals, which occurs when orbitals have the same energy level.

### Step-by-Step Solution:

1. **Understand the Quantum Numbers**:
- Each orbital is described by three quantum numbers:
- Principal quantum number (n)
- Azimuthal quantum number (l)
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