Myopia is a condition of the eye where the crystalline lens focuses the light rays to a position between the lens and the retina. to correct for this condition, a thin lens is placed in front of the eye that will to focus light on the retina. the type of lens required

a) cylindrical.
b) converging
c) diverging
d) spherical.

C) Diverging

Explanation:

In case of eye defect-myopia, the image does not form on retina and person is not able to see far away objects. It is also known as near-sightedness. So, a concave lens that is a diverging lens is used to correct it. A concave lens is thicker at the edges and thinner at the center. With the help of diverging lens, the image is brought back on to the retina.

Thus, option C is correct.  

option (c) is correct.

Explanation:

In case of myopia, the image of an object is formed before the retina. It means the rays of light are converge before the retina so the rays of light should be diverge to form the image at retina. So, to cure the myopia, we use the diverging lens of suitable focal length.

Option (c)

c.the charges if the proton and electron and gravity