Convex mirrors are used as a rear view mirror in motor cycles because A. It forms real image B. It forms erect (upright) image C. It forms smaller image as compared with object D. All of the above

These properties make convex mirrors ideal for use as rearview mirrors in motorcycles. The real image allows the driver to see objects that are behind them, even if they are not directly in their line of sight. The erect image makes it easy for the driver to judge the distance of objects. And the smaller image allows the driver to see a wider field of view.

In addition, convex mirrors are less likely to blind the driver with headlights from oncoming traffic. This is because the light from the headlights is reflected away from the driver’s eyes.

For all of these reasons, convex mirrors are the preferred type of rearview mirror for motorcycles.