The last two pairs of ribs are called (i) ribs because they are (ii) to the breastbone in the front.
Select the correct option for (i) and (ii).

Options

A. false, not attached
B. floating, not attached
C. floating, attached
D. true, directly attached

Explanation

**Step-by-Step Solution:**

1. **Identify the Last Two Pairs of Ribs**: The question asks about the last two pairs of ribs in the human body. In total, there are 12 pairs of ribs.

2. **Determine the Type of Ribs**: The last two pairs of ribs (11th and 12th pairs) are not attached to the breastbone (sternum) at the front. They are known as "false ribs" or more specifically, "floating ribs."

3. **Understand the Attachment**: The term "not attached" refers to the fact that these ribs do not connect directly to the sternum. Instead, they are only attached to the vertebrae at the back.

4. **Fill in the Blanks**: Based on the information:
- For (i), the correct term is "floating ribs."
- For (ii), the correct term is "not attached."

5. **Final Answer**: The last two pairs of ribs are called (i) floating ribs because they are (ii) not attached to the breastbone in the front.

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