What does this traffic sign indicate?

Correct option is A

The correct answer is (a) Height limit of 3.5 metres
Explanation:
· A circular traffic sign with a number (e.g., 3.5m) and arrows pointing vertically (one at the top and one at the bottom) indicates a Height Limit.
· This sign is usually placed before low-clearance structures like underpasses, bridges, or tunnels.
· It warns drivers that vehicles exceeding the specified height (3.5 metres in this case) are prohibited from passing to avoid accidents.
Information Booster:
· A sign with arrows pointing horizontally (left and right) indicates a Width Limit.
· Mandatory signs in India are generally circular with a red border.