Question

Nyctalopia is due to the deficiency of
1. Vitamin A
2. Vitamin D
3. Vitamin E
4. Vitamin K
5.

Answer 1

Correct Answer - Option 1 : Vitamin A

The correct answer is Vitamin A

• Vitamin A is responsible for night blindness
• Night blindness or Nyctalopia is caused due to the deficiency of Vitamin A.
• Vitamin A is also called Retinol
• In this disease, the patient suffers from poor vision at night. Also, it may cause premature death in children below the age of 5.
• Food rich in vitamin A are Carrots, Spinach, Sweet potatoes, Lettuce, etc.

• Vitamin word was used for the first time by C. Funk in 1911.
• Vitamin soluble in water is vitamin B & C.
• Vitamin soluble in fats is Vitamin A, D, E & K.

• Vitamin D
  • The chemical name is Calciferol. Vitamin D is soluble in fat.
  • ​Deficiency cannot absorb calcium and phosphate efficiently and therefore have low serum calcium and phosphate concentrations and high serum parathyroid hormone concentrations.
  • The low serum calcium and phosphate concentrations result in poorly calcified bones. In children, this is known as rickets, and in adults, it is known as osteomalacia. 

• Vitamin E 
  • The chemical name is Tocopherol.
  • Vitamin E is an antioxidant vitamin.
  • It is a fat-soluble compound found principally in certain.
  • It protects unsaturated fats in the body from oxidation by peroxides and other free radicals.
  • It is available in plant oils and the leaves of green vegetables.
  • The other antioxidant vitamins are beta-carotene and vitamin C.
  • Vitamin E is found in vegetables, oils, nuts, etc.
• Vitamin K
  • ​The chemical name is Phytonadione, vitamin K is soluble in Fat.
  • ​The deficiency of vitamin K in the body leads to an increase in the clotting time of the blood.