How many from the given below is/are the correct match ?
I. Asthma : difficulty in breathing due to inflammation of bronchi and bronchioles.
II. Carboxy-haemoglobin
III. Carbonic anhydrase : this enzyme concentration is high in blood plasma
IV. Pneumotasis center : It controls respiration and is present in the medulla

Options

A. Two
B. Three
C. Four
D. One

Answer

To determine how many of the given statements are correct matches, we will analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** Asthma: difficulty in breathing due to inflammation of bronchi and bronchioles.

- **Analysis:** This statement is correct. Asthma is indeed characterized by inflammation of the bronchi and bronchioles, leading to difficulty in breathing.

### Step 2: Analyze Statement II
**Statement II:** Carboxy-haemoglobin.

- **Analysis:** This statement is incomplete as it does not provide a description or context. However, carboxy-haemoglobin refers to the compound formed when carbon monoxide binds to hemoglobin, which can lead to reduced oxygen transport in the blood. Since it lacks a complete match, we cannot consider it correct.

### Step 3: Analyze Statement III
**Statement III:** Carbonic anhydrase: this enzyme concentration is high in blood plasma.

- **Analysis:** This statement is incorrect. Carbonic anhydrase is primarily found in red blood cells and is responsible for the conversion of carbon dioxide and water to bicarbonate and protons. It is not predominantly found in blood plasma.

### Step 4: Analyze Statement IV
**Statement IV:** Pneumotaxic center: It controls respiration and is present in the medulla.

- **Analysis:** This statement is also incorrect. The pneumotaxic center is located in the pons region of the brain, not the medulla. It helps regulate the rate and pattern of breathing.

### Conclusion
After analyzing all four statements:
- Statement I is correct.
- Statement II is incomplete and cannot be judged as correct.
- Statement III is incorrect.
- Statement IV is incorrect.

Thus, only **one statement (I)** is correctly matched.

### Final Answer
The number of correct matches is **1**.

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