A female on maize as staple diet Its diarrhea and lesion in the neck region It is deficiency of
**Core Concept**
The question pertains to a nutritional deficiency disorder associated with a specific dietary habit and clinical presentation. The staple diet mentioned is maize, which is high in a particular nutrient that can lead to an imbalance when consumed excessively.
**Why the Correct Answer is Right**
The patient's symptoms, including diarrhea and a lesion in the neck region, are characteristic of **Pellagra**, a disease caused by a severe deficiency of **Niacin (Vitamin B3)**. Niacin is crucial for energy metabolism and the synthesis of NAD and NADP, which are essential for various enzymatic reactions in the body. The patient's diet rich in maize is likely lacking in tryptophan, an essential amino acid that can be converted to niacin in the body. However, this conversion is inefficient, leading to a niacin deficiency.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the clinical presentation described.
**Option B:** While a deficiency of other B vitamins can cause various symptoms, it does not specifically lead to the described clinical presentation.
**Option C:** This option is incorrect as the disease associated with a maize-based diet is not caused by a deficiency of this vitamin.
**Clinical Pearl / High-Yield Fact**
Pellagra is often referred to as the "three Ds" disease, characterized by diarrhea, dermatitis, and dementia, which can be remembered using the mnemonic "Dreadful Dilemma".
**Correct Answer:** C. Niacin deficiency.