The correct answer is option 4: between the pole of the mirror and the principal focus.

To understand why this is the correct option, let`s first understand the properties of concave mirrors. Concave mirrors are curved inward, like a spoon, and can form both real and virtual images.

When an object is placed between the pole of the concave mirror and the principal focus, the image formed will be virtual, erect, and magnified.

Here`s why:

1. Virtual image: A virtual image is formed when the reflected light rays appear to originate from a point behind the mirror. In this case, the light rays from the object diverge after reflection, but they do not actually converge to form a real image. Instead, they appear to come from a point behind the mirror, creating a virtual image.

2. Erect image: An erect image is one in which the top of the object is at the top of the image, and the bottom of the object is at the bottom of the image. In this case, since the object is placed in front of the mirror facing upright, the virtual image formed will also be in an upright position.

3. Magnified image: A magnified image is larger in size compared to the object.