Which of the following will be curable in next two decades

Options

A. tuberculosis
B. cancer
C. polio myelitis
D. None of these

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which disease among the given options is expected to be curable in the next two decades. The options provided are tuberculosis, cancer, poliomyelitis, and none of these.

2. **Analyzing Tuberculosis (TB)**: Tuberculosis is a disease that currently has a vaccine known as BCG (Bacillus Calmette-Guérin). This vaccine is already in use and helps in preventing TB, indicating that TB has some level of control and management through vaccination.

3. **Analyzing Cancer**: Cancer is a complex group of diseases, and while there are treatments available, a complete curative vaccine is still under development. Research is ongoing, and there is hope that advancements in medicine may lead to effective treatments or vaccines for cancer in the future.

4. **Analyzing Poliomyelitis (Polio)**: Poliomyelitis also has effective vaccines available, namely the inactivated polio vaccine (IPV) and the oral polio vaccine (OPV). These vaccines have been successful in preventing polio, and the disease is largely under control in many parts of the world.

5. **Conclusion**: Given the current status of vaccines and treatments, tuberculosis and poliomyelitis are already managed with existing vaccines. Cancer, however, is still a challenge, and there is optimism that advancements in research may lead to curative options in the next two decades. Therefore, the disease that is expected to be curable in the next two decades is cancer.

### Final Answer:
**Cancer** is the disease that is expected to be curable in the next two decades.

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