Which of the following statements with reference to Coriolis force...

The Coriolis force acts perpendicular to the pressure gradient force. The pressure gradient force is perpendicular to an isobar, while the Coriolis force acts perpendicular to the wind direction. As a result of these forces operating perpendicular to each other, the wind blows around low-pressure areas instead of directly into them.

The magnitude of the Coriolis force is directly proportional to the sine of the latitude angle (\sin \phi$).<br><br>At the equator, the latitude is \phi = 0^{{}^{\circ}}$. Since $\sin 0^{{}^{\circ}} = 0$, the Coriolis force is zero at the equator.

Due to the absence of the Coriolis force at the equator, there is no deflection of the wind. Consequently, the wind moves directly from high pressure to low pressure along the pressure gradient force, which means it blows perpendicular to the isobars.

Therefore, both the given statements are correct.

Answer: Both 1 and 2