The image formed by a convex mirror is always:

An image is an optical illusion created when a mirror reflects light rays from an object. The image that can be displayed on the screen is called a real image. An image that is not displayed on the screen is called a virtual image.  The rules for retrieving the image formed by the convex mirror are as follows: 
Rule 1. Rays parallel to the main axis of a convex mirror tend to be out of focus after specular reflection. 
Rule 2. A ray of light toward the center of curvature of the convex mirror bounces along the same path. 
Rule 3. Rays directed to the focal point of the convex mirror will be parallel to the principal axis after reflection.
Rule 4 The rays that hit the poles of the convex mirror are reflected at the same angle with respect to the main axis. Regardless of the position of the object in front of the convex mirror, the image produced by the convex mirror is always behind the mirror, virtually upright, and smaller (or shrunk) than the object itself. The figure below shows the formation of an image by a convex mirror when an object is placed somewhere between the poles of the mirror and infinity. Therefore, the image produced by the convex mirror is always virtual, upright, and scaled.
Hence, the correct answer is option B.