Aging of skin, cataract, inflamation of cornea is caused by

Options

A. UV - A
B. UV - B
C. UV - C
D. infra red rays

Answer

**Step-by-Step Solution:**

1. **Understanding the Causes of Skin Aging, Cataract, and Corneal Inflammation:**
- The question asks about the causes of aging of the skin, cataract formation, and inflammation of the cornea. These conditions are related to exposure to certain types of radiation.

2. **Identifying the Types of Ultraviolet Radiation:**
- There are three main types of ultraviolet (UV) radiation: UVA, UVB, and UVC. Each type has different effects on the skin and eyes.

3. **Analyzing the Effects of UV Radiation:**
- **UVA Radiation:** This type penetrates the skin more deeply and is primarily associated with skin aging and wrinkles.
- **UVB Radiation:** This type is responsible for causing sunburn and is known to damage the DNA in skin cells. It is directly linked to skin aging, skin cancers, and eye conditions such as cataracts and corneal inflammation.
- **UVC Radiation:** This type is mostly absorbed by the Earth’s atmosphere and does not reach the surface, so it is not a significant factor for these conditions.

4. **Linking UVB Radiation to the Conditions:**
- UVB radiation can cause direct damage to DNA, leading to mutations that result in skin aging and various skin cancers. It also affects the eyes by causing inflammation of the cornea and is a contributing factor to cataract formation.

5. **Conclusion:**
- Based on the analysis, the correct answer to the question is that aging of skin, cataract, and inflammation of the cornea are caused by **UVB radiation**.

**Final Answer:**
- The correct answer is **option B: Ultraviolet B (UVB) radiation**.

---