Chronic diseases ________ .

Options

A. Have long term bad effects on health
B. Include cold, cough, flu, etc.
C. Can be cured only by surgeries
D. Both (A) and (B)

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Chronic Diseases**: Chronic diseases are defined as health conditions that persist over a long period of time. They often require ongoing medical attention and can limit daily activities.

2. **Analyzing the Options**:
- **Option A**: "have a long term bad effect on health" - This is true for chronic diseases as they can lead to significant health complications over time.
- **Option B**: "include cough, cold, flu etc." - This is incorrect. Cough, cold, and flu are examples of acute diseases, which are short-term illnesses.
- **Option C**: "can be cured only by surgeries" - This is also incorrect. Chronic diseases may require various treatments, not just surgeries.
- **Option D**: "both A and B" - Since option B is incorrect, this option cannot be true.

3. **Conclusion**: Based on the analysis, the correct answer is **Option A: have a long term bad effect on health**.