A sectional view of mammory gland shows
(i) nipple + areola
(ii) mammary lobe, alveolus and duct
(iii) antibodies + pectoralis major muscles + ribs
(iv) ampulla + lactiferous duct

Options

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

Explanation

To answer the question about the structures visible in a sectional view of the mammary gland, we will analyze each option provided and determine which structures are indeed part of the mammary gland anatomy.

### Step-by-Step Solution:

1. **Understanding the Mammary Gland Structure**:
- The mammary gland is a complex structure that includes various components essential for milk production and delivery. It consists of glandular tissue, ducts, and external features.

2. **Analyzing Each Option**:
- **Option (i)**: Nipple + Areola
- The nipple is the external structure through which milk is delivered, and the areola is the pigmented area surrounding the nipple. Both are indeed visible in a sectional view.

- **Option (ii)**: Mammary Lobe, Alveolus, and Duct
- Each mammary gland contains lobes made up of smaller structures called alveoli, which produce milk. The ducts transport the milk from the alveoli. All these components are visible in a sectional view.

- **Option (iii)**: Antibodies + Pectoralis Major Muscles + Ribs
- While the pectoralis major muscles and ribs may be present in the anatomical section, antibodies are not a structural component of the mammary gland. Therefore, this option is not correct.

- **Option (iv)**: Ampulla + Lactiferous Duct
- The ampulla is a wider part of the duct system that stores milk before it is released through the lactiferous duct. Both structures are indeed visible in a sectional view of the mammary gland.

3. **Conclusion**:
- The structures visible in a sectional view of the mammary gland include:
- (i) Nipple + Areola
- (ii) Mammary Lobe, Alveolus, and Duct
- (iv) Ampulla + Lactiferous Duct
- Therefore, the correct answer includes options (i), (ii), and (iv).

### Final Answer:
The structures visible in a sectional view of the mammary gland are:
- Nipple + Areola
- Mammary Lobe, Alveolus, and Duct
- Ampulla + Lactiferous Duct