The orbital diagram in which both the pauli's exclusion principal and Hund's rule are violated is :

Options

A.
B.
C.
D.

Answer

To solve the question regarding the orbital diagram that violates both Pauli's exclusion principle and Hund's rule, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Principles**:
- **Pauli's Exclusion Principle**: This principle states that no two electrons in an atom can have the same set of quantum numbers. In simpler terms, if two electrons occupy the same orbital, they must have opposite spins.
- **Hund's Rule**: This rule states that when electrons occupy orbitals of the same energy (degenerate orbitals), one electron enters each orbital until all are half-filled before any pairing occurs.

2. **Analyze the Options**:
- We need to look at the provided orbital diagrams (not shown here) and check each one against the two principles.

3. **Identify Violations**:
- For each option:
- Check if any two electrons in the same orbital have the same spin (this would violate Pauli's exclusion principle).
- Check if any orbitals are paired before all orbitals have one electron (this would violate Hund's rule).

4. **Evaluate the First Option**:
- In the first option, if it shows two electrons in the same orbital with the same spin, it violates Pauli's exclusion principle.
- If it also shows that electrons are paired in orbitals before all orbitals have one electron, it violates Hund's rule.

5. **Conclusion**:
- Based on the analysis, if the first option violates both principles, it is the correct answer to the question.

### Final Answer:
The orbital diagram that violates both Pauli's exclusion principle and Hund's rule is the **first option**.

---