When an object is kept at infinity, the nature of the image formed by a convex lens is:

1. Real

2. Inverted

3. Virtual

4. Upright

The correct answer/s is/are

When an object is at an infinite distance from a convex (converging) lens, the light rays entering the lens are parallel to the principal axis. These rays undergo refraction and meet at the focus ($F_2$) on the opposite side of the lens.