What is the correct hand signal for a left turn?

The correct hand signal for a left turn is to extend your left arm straight out from the driver's side window. This universal signal indicates to other drivers and pedestrians that you intend to make a left turn. Using your left arm keeps your signal visible to others who may be behind or to the side of your vehicle.

In traffic situations where electronic signals may not be visible, or in the case of a vehicle malfunction, hand signals are vital for communication on the road. Therefore, extending the left arm ensures clarity of intent, maintaining safety for yourself and others on the road.

The other choices would lead to confusion, as they either indicate right turns or do not convey the action of making a left turn effectively.