Name one substance which can act as both :
(i) Analgesic and antipyretic .
(ii) Antiseptice and disinfectant .

Explanation

To answer the question, we need to identify substances that serve dual purposes in their respective categories.

### Step-by-Step Solution:

1. **Identify a Substance that Acts as Both Analgesic and Antipyretic:**
- **Definition of Analgesic:** An analgesic is a medication that relieves pain.
- **Definition of Antipyretic:** An antipyretic is a medication that reduces fever.
- **Substance:** Aspirin is a well-known medication that serves both functions. It alleviates pain (acting as an analgesic) and lowers body temperature (acting as an antipyretic).
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