What type of signal is used to indicate a left turn?

Answer: A — Left arm straight out

A left turn is indicated by extending the left arm straight out from the vehicle. This hand signal clearly communicates the driver's intention to turn left to other road users, including pedestrians and cyclists. This form of communication is particularly important when a vehicle's turn signals may not be functioning or in situations where the driver needs to provide additional visibility, such as in a busy intersection. Other signals, like a bent arm upward or downward, signify different actions: a bent arm upward indicates a right turn, while a bent arm downward generally signifies a stop. The right arm straight out is not commonly used for indicating a turn, as it is typically reserved for a right turn signal. Understanding these hand signals is crucial for safe driving practices and for effectively communicating intentions on the road.