Oncology is the study of
A Protozoan parasites B. Tumor C. cancer

Options

A. A,B
B. B,C
C. A,C
D. None of these

Answer

To solve the question "Oncology is the study of", we will analyze the options provided:

1. **Understanding Oncology**:
- Oncology is the branch of medicine that deals with the prevention, diagnosis, and treatment of cancer. It focuses on tumors, which can be benign (non-cancerous) or malignant (cancerous).

2. **Analyzing the Options**:
- **Option A: Protozoan parasites**: This option is incorrect as oncology does not deal with parasites; it specifically focuses on cancer and tumors.
- **Option B: Tumor**: This option is partially correct. Tumors are indeed a significant aspect of oncology, as they can be either benign or malignant.
- **Option C: Cancer**: This option is also correct. Cancer is the primary focus of oncology, as it encompasses the study of malignant tumors and their treatment.

3. **Conclusion**:
- Since oncology encompasses both the study of tumors and cancer, the most accurate answer would be that oncology is the study of both B (Tumor) and C (Cancer).

Final Answer: **B. Tumor and C. Cancer**.