Good vision depends on adequate intake of cacotene rich food
Select the best option from the following statements
(A) Vitamin A derivatives are formed from carotene
(B) The photopigments are embedded in the membrane discs of the ineer segment
( C) Retinal is a derivative of Vitamin A
(D) Retinal is a light absorbing part of all the visual photopigments

Options

A. (a) & (b)
B. (a) , (c ) & (d)
C. (a) & (c )
D. (b), (c ) & (d)

Answer

To solve the question regarding the statements related to carotene and vision, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Understanding Carotene and Vitamin A**:
- Carotene is a pigment found in many fruits and vegetables, particularly those that are orange, yellow, or green. It is a precursor to Vitamin A.
- Vitamin A is essential for good vision as it is involved in the formation of photopigments in the retina.

**Hint**: Recall that carotene is a source of Vitamin A, which is crucial for eye health.

2. **Analyzing Statement (A)**:
- **Statement (A)**: "Vitamin A derivatives are formed from carotene."
- This statement is true because carotene is converted into Vitamin A in the body, which then forms various derivatives necessary for vision.

**Hint**: Think about how the body processes nutrients from food.

3. **Analyzing Statement (B)**:
- **Statement (B)**: "The photopigments are embedded in the membrane discs of the inner segment."
- This statement is misleading. Photopigments, such as rhodopsin, are actually located in the outer segments of photoreceptor cells (rods and cones) in the retina, not the inner segment.

**Hint**: Consider the structure of photoreceptors in the retina.

4. **Analyzing Statement (C)**:
- **Statement (C)**: "Retinal is a derivative of Vitamin A."
- This statement is true. Retinal (or retinaldehyde) is indeed a derivative of Vitamin A and is crucial for the phototransduction process in vision.

**Hint**: Remember the relationship between Vitamin A and its derivatives.

5. **Analyzing Statement (D)**:
- **Statement (D)**: "Retinal is a light-absorbing part of all the visual photopigments."
- This statement is also true. Retinal is the component of photopigments that absorbs light, allowing for vision.

**Hint**: Think about the role of retinal in the process of seeing.

### Conclusion:
Based on the analysis:
- Statements (A), (C), and (D) are correct.
- Statement (B) is incorrect.

Thus, the best options are **(A), (C), and (D)**.

### Final Answer:
The correct statements are (A), (C), and (D).

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