How many subshells are associated with `n=4` ?

Explanation

To determine how many subshells are associated with the principal quantum number \( n = 4 \), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number (n)**:
The principal quantum number \( n \) indicates the energy level or shell of an electron in an atom. In this case, \( n = 4 \) means we are looking at the fourth shell.

**Hint**: Remember that the principal quantum number indicates the main energy level of the electron.
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