A person excretes more and dilute urine but amount of glucose in urine is absent. The person is suffering from -

Options

A. Diabetes insipidus
B. Diabetes mellitus
C. Myasthenia gravis
D. Cushing syndrome

Answer

To solve the question, we need to analyze the symptoms presented and determine the condition that matches them.

### Step-by-Step Solution:

1. **Understanding Urine Characteristics**: The question states that the person excretes "more and dilute urine." This indicates a condition where the kidneys are producing a large volume of urine that is not concentrated.

**Hint**: Look for conditions that lead to increased urine output and low concentration.

2. **Absence of Glucose**: The question also mentions that there is an "absence of glucose in urine." In conditions like diabetes mellitus, glucose is typically present in the urine due to high blood sugar levels. Since glucose is absent, we can rule out diabetes mellitus.

**Hint**: Consider conditions where glucose is not excreted in urine.

3. **Identifying Possible Conditions**: The symptoms described (more dilute urine and absence of glucose) are characteristic of diabetes insipidus, which is a condition caused by a deficiency of the antidiuretic hormone (ADH) or a lack of response to it. This leads to excessive urination and thirst.

**Hint**: Think about conditions related to hormone imbalances affecting urine concentration.

4. **Ruling Out Other Conditions**: The other conditions mentioned, such as myasthenia gravis and Cushing's syndrome, do not fit the symptoms:
- Myasthenia gravis is an autoimmune disease affecting muscle strength and does not relate to urine characteristics.
- Cushing's syndrome is associated with excess cortisol and can lead to various symptoms, but it does not specifically cause more dilute urine without glucose.

**Hint**: Eliminate conditions that do not match the symptoms of increased urine output and absence of glucose.

5. **Conclusion**: Based on the analysis, the person is suffering from diabetes insipidus, which is characterized by the excretion of large volumes of dilute urine and the absence of glucose.

**Final Answer**: The person is suffering from diabetes insipidus.