Riboflavin is an important group of water soluble vitamin. Cereals and pulses are relatively good sources of Riboflavin. Most common lesion associated with Riboflavin deficiency, which can also be used as an index of state of nutrition of group of children is

**Core Concept**
Riboflavin, also known as Vitamin B2, is an essential water-soluble vitamin that plays a crucial role in energy production, cellular function, and maintaining healthy skin, hair, and mucous membranes. Cereals and pulses are indeed good sources of riboflavin, but a deficiency in this vitamin can lead to various health issues.

**Why the Correct Answer is Right**
The most common lesion associated with riboflavin deficiency is ariboflavinosis, which affects the mucous membranes, skin, and eyes. This condition is characterized by cracks in the corners of the mouth, inflammation of the tongue, and lesions on the lips. In children, the severity of riboflavin deficiency can be used as an index of their nutritional status. The condition is often seen in individuals who have a poor diet, chronic diseases, or are on certain medications that interfere with riboflavin absorption.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so we cannot evaluate its accuracy.
* **Option B:** This option is not provided, so we cannot evaluate its accuracy.
* **Option C:** This option is not provided, so we cannot evaluate its accuracy.
* **Option D:** This option is not provided, so we cannot evaluate its accuracy.

**Clinical Pearl / High-Yield Fact**
Ariboflavinosis is often seen in conjunction with other nutritional deficiencies, such as thiamine (Vitamin B1) and pyridoxine (Vitamin B6) deficiencies. It is essential to diagnose and treat riboflavin deficiency early to prevent long-term complications.

**Correct Answer: C. Cheilosis. Cheilosis is a condition characterized by inflammation and cracks in the corners of the mouth, often seen in individuals with riboflavin deficiency.**

✓ Correct Answer: B. Angular stomatitis