Detailed Instructions: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Problem:Question: The most common cause of mildmoderate hemoptysis is:
Options: <1> Bronchiectasis <2> Bronchogenic carcinoma <3> Hemorrhagic diathesis. <4> Pulmonary infarction. <5> Pneumonia.
Solution:
1