Which of the following is a non-infectious disease ?

Options

A. common cold
B. cancer
C. malaria
D. cholera

Answer

To determine which of the following is a non-infectious disease, we need to understand the difference between infectious and non-infectious diseases.

1. **Identify Infectious Diseases**: Infectious diseases are caused by pathogens such as bacteria, viruses, fungi, protozoans, and helminths. Examples include common cold, malaria, and cholera.

2. **Analyze the Options**:
- **Common Cold**: Caused by rhinoviruses, making it an infectious disease.
- **Cancer**: Characterized by the uncontrolled proliferation of cells. It is not caused by any infectious agent but rather by carcinogens (chemical, physical, or biological agents).
- **Malaria**: Caused by the protozoan Plasmodium vivax, making it an infectious disease.
- **Cholera**: Caused by the bacterium Vibrio cholerae, also an infectious disease.

3. **Conclusion**: Among the options provided, cancer is the only disease that is non-infectious. Therefore, the correct answer is cancer.

**Final Answer**: Cancer is a non-infectious disease.