True rib are 7 pairs in `:`

Options

A. Rabbit
B. Man
C. Both
D. None

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the number of true ribs in pairs, specifically in the context of mammals.

2. **Definition of True Ribs**: True ribs are defined as the ribs that are directly attached to the sternum. In humans and many mammals, there are a total of 12 pairs of ribs.

3. **Counting the Ribs**: Out of the 12 pairs of ribs:
- 7 pairs are considered true ribs because they are directly attached to the sternum.
- 5 pairs are not directly attached:
- 3 pairs are known as false ribs, which are indirectly attached to the sternum via cartilage.
- 2 pairs are known as floating ribs, which have no attachment to the sternum.

4. **Identifying the Options**: The options provided are:
- A) Rabbit
- B) Man
- C) Both
- D) None

5. **Analyzing the Options**: Since both rabbits and humans have 7 pairs of true ribs, the correct answer must encompass both.

6. **Final Answer**: Therefore, the correct answer to the question is option C, which states that true ribs are found in both rabbit and man.

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