The vitamin which is important in the formation of the retina pigment is

Step 1: Analyze the question The question asks which vitamin is needed to make the pigment in the retina, the light-sensitive layer at the back of the eye.

Step 2: Explain the concept The retina has two kinds of photoreceptor cells:

• Rod cells, which work in dim light.
• Cone cells, which work in bright light and detect colour.

Rod cells contain a light-sensitive pigment called rhodopsin (visual purple). The body makes rhodopsin from retinal, a compound derived from Vitamin A (retinol). Without enough Vitamin A, the body cannot make enough rhodopsin.

Step 3: Check the options

• A. Vitamin A: Needed to form rhodopsin, the retinal pigment. Deficiency causes night blindness and, in severe cases, xerophthalmia.
• B. Vitamin B: Supports metabolism and the nervous system. Deficiency causes beriberi (B1) and pellagra (B3).
• C. Vitamin C: Needed for healthy tissues and wound healing. Deficiency causes scurvy.
• D. Vitamin D: Helps absorb calcium and phosphorus for bones and teeth. Deficiency causes rickets.

Step 4: Answer Vitamin A is the vitamin used to form the retinal pigment.

Tip: Link A with Appearance and Active eyes: Vitamin A, night blindness and the retina. Remember the other deficiency pairs too:

• C → scurvy
• D → rickets
• B1 → beriberi

Foods rich in Vitamin A include carrots, palm oil, liver, eggs and green leafy vegetables like ugu and spinach.