Arrange the following orbital in the increasing order of the energy
`3s, 4d, 2p, 4s,3p`

Explanation

To arrange the given orbitals in increasing order of energy, we need to consider their principal quantum numbers and the order in which they fill according to the Aufbau principle.

### Step-by-Step Solution:

1. **Identify the Principal Quantum Numbers**:
- The principal quantum number (n) indicates the energy level of an orbital. The given orbitals are:
- 3s (n=3)
- 4d (n=4)
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