Question

Assertion :First seven pairs of ribs are called true ribs. Reason: These ribs are connected ventrally to the sternum.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion Is true but reason is false
• D. If both assertion and reason are false.

Answer 1

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion.

There are 12 pairs of ribs. The upper 7 ribs are attached in front directly to the sternum by hyaline cartilage. These are known as true ribs and the next three pairs of ribs attach indirectly to the sternum. They are termed as false ribs. The two lower pair of ribs are free in front and they are known as floating ribs. 10th rib is also usually floating in Japanese and some other people.

So, the correct option is 'If both assertion and reason are true and the reason is the correct explanation of assertion.'