Which branch of medicine deals with the prevention, diagnosis, and treatment of cancer?

The correct answer is - গ) Oncology.

• Oncology
- English Meaning: a branch of medicine concerned with the prevention, diagnosis, treatment, and study of cancer.

• Other options:
- Archaeology (প্রত্নবিদ্যা): the scientific study of material remains (such as tools, pottery, jewelry, stone walls, and monuments) of past human life and activities.
- Petrology (শিলাতত্ত্ব): a science that deals with the origin, history, occurrence, structure, chemical composition, and classification of rocks.
- Anthropology (নরবিদ্যা; নৃতত্ত্ব): the science of human beings.

Source: 1. Merriam-Webster Dictionary.
2. Accessible Dictionary.