Which of the following is not according to the pauli exclusion principal ?

Options

A.
B.
C.
D. a and b both

Explanation

To determine which of the given diagrams does not adhere to the Pauli Exclusion Principle, we need to first understand the principle itself.

### Step-by-Step Solution:

1. **Understand the Pauli Exclusion Principle**:
- The Pauli Exclusion Principle states that no two identical fermions (in this case, electrons) can occupy the same quantum state within a quantum system. This means that in an atom, no two electrons can have the same set of quantum numbers.

2. **Identify the Rules**:
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