Which are the symptoms common to both diabetes mellitus and diabetes insipidus
I. Polyphagia
II. Polydipsia
III. Polyuria
IV. Hyperglycemia
V. Ketonuria
VI. Ketonemia

Options

A. II and III
B. I, III and IV
C. IV, V and VI
D. III,V, VI

Answer

To determine the symptoms common to both diabetes mellitus and diabetes insipidus, we will analyze each symptom listed in the question:

1. **Polyphagia**: This refers to excessive hunger. It is a symptom associated with diabetes mellitus due to high blood sugar levels, but it is not a symptom of diabetes insipidus. Therefore, it is not common to both.

2. **Polydipsia**: This is excessive thirst. It is a symptom of both diabetes mellitus and diabetes insipidus. Thus, it is common to both conditions.

3. **Polyuria**: This refers to excessive urination. Both diabetes mellitus and diabetes insipidus are characterized by increased urine output. Therefore, this symptom is also common to both.

4. **Hyperglycemia**: This is high blood sugar levels, which is a hallmark of diabetes mellitus. It is not a symptom of diabetes insipidus. Thus, it is not common to both.

5. **Ketonuria**: This refers to the presence of ketone bodies in urine, which occurs in diabetes mellitus due to fat metabolism when insulin is insufficient. It is not a symptom of diabetes insipidus. Therefore, it is not common to both.

6. **Ketonemia**: This is the presence of ketone bodies in the blood. It is primarily associated with diabetes mellitus and not with diabetes insipidus. Hence, it is not common to both.

Based on the analysis, the symptoms that are common to both diabetes mellitus and diabetes insipidus are:

- **Polydipsia (II)**
- **Polyuria (III)**

Thus, the correct answer is **II and III**.

### Summary of Common Symptoms:
- **Polydipsia**: Common to both.
- **Polyuria**: Common to both.

### Final Answer:
The symptoms common to both diabetes mellitus and diabetes insipidus are **II (Polydipsia) and III (Polyuria)**.

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