Non-ionizing radiations commonly used for inducing mutations in organism are :-

Options

A. UV-rays
B. Beta-rays
C. X-rays
D. Gamma-rays

Answer

To answer the question about which non-ionizing radiations are commonly used for inducing mutations in organisms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Radiation**:
- Radiation can be classified into two main types: ionizing and non-ionizing.
- Ionizing radiation has enough energy to remove tightly bound electrons from atoms, leading to ionization. Examples include gamma rays, X-rays, and beta rays.
- Non-ionizing radiation does not carry enough energy to ionize atoms or molecules but can still cause changes in the structure of DNA.

2. **Identify Non-Ionizing Radiation**:
- The most common type of non-ionizing radiation that is known to induce mutations is ultraviolet (UV) radiation.
- UV radiation can cause the formation of dimers, particularly thymine dimers, which can lead to mutations in the DNA sequence.

3. **Evaluate the Options**:
- **Option A: UV rays** - This is a non-ionizing radiation that can induce mutations by forming dimers in DNA.
- **Option B: Beta rays** - This is an ionizing radiation, so it does not fit the criteria of non-ionizing.
- **Option C: X-rays** - This is also an ionizing radiation and not suitable for the question.
- **Option D: Gamma rays** - Like X-rays, gamma rays are ionizing and do not meet the requirement.

4. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **Option A: UV rays**, as it is the only non-ionizing radiation listed that is commonly used to induce mutations in organisms.

### Final Answer:
**The non-ionizing radiations commonly used for inducing mutations in organisms are UV rays (Option A).**

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