Question

Read the assertion and reason carefully to mark the correct option in question.
Assertion: Cervical vertebrae, ribs and sternum together form the rib cage.
Reason: The bones of the limbs along with the girdles constitute the axial skeleton.

Answer 1

Assertion-Reason relation
Ribs are 12 pairs of bones which protect the organs present in the thoracic cavity of the body as well as kidneys. Ribs, along with sternum and thoracic vertebrae form the rib cage which is responsible for protection of organs.
Hence, the given assertion- “Cervical vertebrae, ribs and sternum together form the rib cage.” is incorrect.
Skeleton system is the framework of the body composed of bones and cartilages. There are two types of skeleton- axial skeleton and appendicular skeleton.
Axial skeleton comprises of the bones present along the main axis of the body. It has four parts- skull, sternum, ribs and vertebral column.
Appendicular skeleton is composed of bones which support the appendages of the body. It constitutes the limbs and girdles.
Hence, the given reason- “The bones of the limbs along with the girdles constitute the axial skeleton” is incorrect.
Final answer
(D) If both assertion and reason are false.