Vector Nature: Magnetic dipole moment ($\mathbf{M}$) is a vector quantity directed from the South pole to the North pole of the magnet .

Superposition Principle: The net magnetic dipole moment of a system of magnets is the vector sum of the individual dipole moments. For two magnets of equal magnetic moment $M$ inclined at an angle $\theta$, the resultant moment $M_{net}$ is given by the parallelogram law of vector addition: $M_{net} = \sqrt{M^2 + M^2 + 2M^2 \cos \theta} = \sqrt{2M^2(1 + \cos \theta)}$ $M_{net} = 2M \cos(\theta/2)$

Maximization: The value of $M_{net}$ depends on $\cos(\theta/2)$. The cosine function decreases as the angle increases from $0^\circ$ to $180^\circ$. Therefore, the resultant magnetic moment is highest when the angle $\theta$ between the magnetic moments is the smallest.

Conclusion: Without seeing the figures, standard physics principles dictate that the configuration with the most acute angle (closest to parallel alignment, $\theta \to 0^\circ$) will yield the maximum net dipole moment. Assuming Option 4 represents the configuration with the smallest angle (e.g., $30^\circ$ or parallel), it is the correct choice.