The vitamin deficiency that leads to megaloblastic anemia is: MCQ with Answer and Explanation

Explanation:
Cataract is clouding of the crystalline lens leading to decreased vision, commonly age-related. Glaucoma is optic nerve damage often due to increased intraocular pressure. Myopia is nearsightedness, hypermetropia is farsightedness. Cataract surgery replaces the lens with an artificial one.

Explanation:
The kidneys are the primary excretory organs, filtering blood through nephrons to remove waste products and excess water, forming urine. The liver is a multifunctional organ that produces bile, which is stored in the gall bladder and released into the small intestine to emulsify fats, aiding in their digestion. The spleen is a lymphoid organ involved in filtering blood and immune responses; it does not produce digestive enzymes (the pancreas does). Thus, statements 1 and 2 are correct.

Explanation:
Tuberculosis is a bacterial disease caused by Mycobacterium tuberculosis, primarily affecting the lungs. Polio is a viral disease caused by the poliovirus, attacking the nervous system. Tetanus is caused by the bacterium Clostridium tetani, which produces a neurotoxin that causes severe muscle spasms and affects the nervous system. Thus, only statement 3 is correct.