Which of the following is commomly used as disinfectant ?

Options

A. Acriflavin
B. Mercurochrome
C. Tincture of iodine j
D. Phenol

Answer

To determine which of the given options is commonly used as a disinfectant, we will analyze each option based on their properties and uses.

### Step-by-Step Solution:

1. **Understanding Disinfectants**:
- Disinfectants are substances that are used to kill or inhibit the growth of microorganisms such as bacteria, viruses, and fungi. They are typically used on inanimate objects and surfaces.

2. **Analyzing the Options**:
- **Option A: Acryflavin**:
- Acryflavin is primarily an antiseptic and is harmful if inhaled. It is not commonly used as a disinfectant.
- **Option B: Mekurochrom**:
- Mekurochrom (also known as Merbromin) is used as an antiseptic for treating cuts and wounds on living tissues. It is not classified as a disinfectant.
- **Option C: Tincture of Iodine**:
- Tincture of iodine is a weak iodine solution that can be used as a disinfectant due to its antimicrobial properties. However, it is more often used as an antiseptic.
- **Option D: Phenol**:
- Phenol is a well-known disinfectant that has been used for a long time. It is effective against a wide range of microorganisms and can be used in various concentrations for different purposes. A 1% solution acts as a disinfectant, while a 0.2% solution can serve as an antiseptic.

3. **Conclusion**:
- After analyzing all the options, the most common disinfectant among the choices provided is **Phenol (Option D)**.

### Final Answer:
The commonly used disinfectant is **Phenol (Option D)**.

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