Excessive exposure of humans to UV - rays results in

Ultraviolet rays can affect human health causing skin cancer and affecting the immune system. Excessive exposure of humans to UV rays can lead to skin cancer because UV rays can damage DNA in skin cells. UV rays also affect the distribution and activity of cells that trigger the immune responses which makes the immune system weak. This implies correct options are A and C.

Since an excessive exposure of humans to UV - rays can lead to skin cancer and damage to the immune system. The correct answer is option A and C,i.e. Damage to immune system and skin cancer