Which respiratroy disease is characterized by spasm of bronchial muscles?

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a respiratory disease that is characterized by the spasm of bronchial muscles. This indicates that we need to identify a condition where there is involuntary contraction of the muscles in the bronchioles.

2. **Identifying Bronchial Muscle Spasm**: The spasm of bronchial muscles leads to constriction of the airways. This constriction can cause difficulty in breathing, wheezing, and coughing.

3. **Recognizing the Disease**: One of the most common respiratory diseases associated with bronchial muscle spasms is **asthma**. In asthma, the airways become inflamed and constricted, leading to symptoms like shortness of breath and wheezing.

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