Which of the following is correct about the appendicular skeleton ?
i. The clavicle articulates with the glenoid cavity.
ii. Pectoral and pelvic girdle bones help in the articulation of the upper and the lower limbs respectively with the axial skeleton .
iii. The calvicle is a triangular flat bone situated in the dorsal part of the thorax between the second and seventh ribs .
iv. There are 8 carpal bones in hand .

Options

A. i, ii and iv
B. ii and iv
C. ii and iii
D. i and iv

Answer

To determine which statements about the appendicular skeleton are correct, let's analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** The clavicle articulates with the glenoid cavity.

- The clavicle does not directly articulate with the glenoid cavity. Instead, it articulates with the acromion of the scapula (shoulder blade) and the sternum. The glenoid cavity is part of the scapula and serves as the socket for the humerus (upper arm bone). Therefore, this statement is **incorrect**.

### Step 2: Analyze Statement II
**Statement II:** Pectoral and pelvic girdle bones help in the articulation of the upper and lower limbs respectively with the axial skeleton.

- This statement is accurate. The pectoral girdle (composed of the clavicle and scapula) connects the upper limbs to the axial skeleton (the spine and ribcage), while the pelvic girdle connects the lower limbs to the axial skeleton. Thus, this statement is **correct**.

### Step 3: Analyze Statement III
**Statement III:** The clavicle is a triangular flat bone situated in the dorsal part of the thorax between the second and seventh ribs.

- This statement is incorrect. The clavicle is a long bone that is located in the anterior part of the thorax, not the dorsal part. It does not lie between the second and seventh ribs; instead, it lies above the first rib and connects to the sternum and scapula. Therefore, this statement is **incorrect**.

### Step 4: Analyze Statement IV
**Statement IV:** There are 8 carpal bones in the hand.

- This statement is correct. The human wrist contains 8 carpal bones, which are arranged in two rows: the proximal row (scaphoid, lunate, triquetrum, pisiform) and the distal row (trapezium, trapezoid, capitate, hamate). Thus, this statement is **correct**.

### Conclusion
Based on the analysis:
- Statement I: Incorrect
- Statement II: Correct
- Statement III: Incorrect
- Statement IV: Correct

The correct statements about the appendicular skeleton are **Statement II and Statement IV**.

### Final Answer
The correct option regarding the appendicular skeleton is **Statement II and Statement IV**.

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