<u>Answer:</u> The correct answer is Option A.
<u>Explanation:</u>
From the given options:
1. Flat mirror: This type of mirror is also known as plane mirror. The nature of the image formed by these mirrors is that the image is always virtual, upright, same as the size of an object and is formed at the same distance from the mirror as that of an object.
2. Concave mirror: This is a type of spherical mirror which has reflecting surface present on the inside region. The image formed by these mirrors can be virtual and upright or real and inverted. Size of the image depends on the position of the object from the mirror.
3. Convex mirror: This is a type of spherical mirror which has reflecting surface present on the outside region. The image formed by these images is always virtual, erect and of smaller size.
4. Spherical mirror: There are two types of spherical mirrors: Concave mirror and convex mirror.
Hence, the correct answer is Option A.
