Monkeys and some lower groups have certain blood groups which are

Options

A. Identical to those of man
B. Identical to those of anthropod apes
C. Somewhat similar to white persons
D. Not identical to those of man.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the blood groups of monkeys and some lower primate groups in relation to humans. We need to determine which statement about their blood groups is correct.

2. **Identifying Blood Group Systems**: Monkeys and apes have two main categories of blood groups: the human type and the semen type. The human type is particularly relevant for our comparison.

3. **RH Factor Explanation**: The RH factor, which is named after the rhesus monkey, is a significant component of the human blood group system. It was discovered through experiments that indicated a similarity between the blood of rhesus monkeys and humans.

4. **Commonality of RH Factor**: The RH factor is present in both monkeys and humans, indicating that certain blood groups in monkeys are identical to those in humans. This factor is crucial for blood transfusions and is a key part of the ABO blood group system.

5. **Evaluating the Options**:
- **Option 1**: Identical to those of man - This is correct as the RH factor is common in both.
- **Option 2**: Identical to those of anthropoid apes - This is incorrect.
- **Option 3**: Somewhat similar to white persons - This is misleading as it is more than just somewhat similar; it is identical.
- **Option 4**: Not identical to those of man - This is incorrect.

6. **Conclusion**: The correct answer is that monkeys and some lower groups have blood groups that are identical to those of man.

**Final Answer**: The correct option is **Option 1: Identical to those of man**.

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