Which of the following is an example of carcinoma?

Options

A. cancer of lymph gland
B. cancer of muscle
C. cancer of blood
D. melanoma cancer of skin

Answer

**Step-by-Step Solution:**

1. **Understanding Carcinoma:**
- Carcinoma is defined as a type of cancer that originates in epithelial tissues. These tissues can be found on the skin and lining of internal organs such as the liver, kidneys, and lungs. It is one of the most common types of cancer.

2. **Analyzing the Options:**
- The question provides several options to identify which one is an example of carcinoma:
- **A. Cancer of lymph gland:** This type of cancer is known as lymphoma, which does not originate from epithelial tissue. Therefore, it is not a carcinoma.
- **B. Cancer of muscles:** This is referred to as sarcoma, which arises from connective tissues such as muscles, bones, and cartilage. Thus, it is also not a carcinoma.
- **C. Cancer of blood:** This is known as leukemia, which originates from blood-forming tissues and does not involve epithelial tissue. Hence, it is not a carcinoma.
- **D. Melanoma (cancer of skin):** Melanoma specifically affects melanocytes, which are skin cells. Since it originates from epithelial tissue, it is considered a type of carcinoma.

3. **Conclusion:**
- After analyzing all the options, the correct answer is **D. Melanoma**, as it is an example of carcinoma.