**Explanation:**

A plane mirror reflects light in such a way that the incident light rays appear to originate from behind the mirror. This creates the illusion of a virtual image, which cannot be projected onto a screen. In the case of a real image, the light rays actually converge at a point and can be projected onto a screen.

**Divergent Light Rays:**
Divergent light rays are those that spread out as they propagate. They are typically produced by a light source that emits light in all directions, such as a candle flame or a light bulb. Divergent light rays do not converge and therefore cannot form a real image.

**Convergent Light Rays:**
Convergent light rays are those that come together or converge at a point. They are typically produced by a lens or a concave mirror. Convergent light rays can form a real image when they pass through a lens or are reflected by a concave mirror.

**Parallel Light Rays:**
Parallel light rays are those that propagate in straight lines without converging or diverging. They are typically produced by a distant light source, such as the Sun. Parallel light rays do not converge and therefore cannot form a real image.

**Application to the Plane Mirror:**
A plane mirror reflects light in such a way that the angles of incidence and reflection are equal. This means that the reflected rays are parallel to the incident rays. Since parallel rays do not converge, a plane mirror cannot form a real image.

Therefore, the correct answer is option **B) Convergent**. A pencil of light incident on a plane mirror is not convergent, divergent, or parallel. It simply reflects off the mirror at the same angle as the incident angle, resulting in a virtual image.

A plane mirror reflects a pencil of light to form a real image. then the pencil of light incident on the mirror is... when the convergence point O.