Select the correct option.
| 1. | There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. |
| 2. | 8th, 9th and 10th pairs of ribs articulate directly with the sternum. |
| 3. | 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage. |
| 4. | Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum. |
| Assertion (A): | In humans the first seven pairs of ribs are classified as true ribs. |
| Reason (R): | They directly articulate with the sternum via their own costal cartilage. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Match the following columns and select the correct option.
| Column I | Column-II | ||
| (a) | Floating Ribs | (i) | Located between second and seventh ribs |
| (b) | Acromion | (ii) | Head of the Humerus |
| (c) | Scapula | (iii) | Clavicle |
| (d) | Glenoid cavity | (iv) | Do not connect with the sternum |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iv) | (ii) | (i) | (iii) |
Out of ‘X’ pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:
| 1. | X=12, Y=5 True ribs are attached to vertebral column and sternum on the two ends. |
| 2. | X=24, Y=7 True ribs are dorsally attached to vertebral column but are free on ventral side. |
| 3. | X=24, Y=12 True ribs are dorsally attached to vertebral column but are free on ventral side. |
| 4. | X=12, Y=7 True ribs are attached dorsally to vertebral column and ventrally to the sternum. |
| Statement I: | Each rib is a thin flat bone connected ventrally to the vertebral column and dorsally to the sternum. |
| Statement II: | Each rib has two articulation surfaces on its ventral end and is hence called bicephalic. |