What is the use of drugs in valvulopathies, specifically in mitral stenosis?

The degenerative fibrocalcific etiology is the most common cause of significant mitral stenosis.
The clinical presentation of mitral stenosis is progressive dyspnea.
The use of drugs is not recommended in the treatment of mitral stenosis.
The rheumatic etiology is the most common cause of significant mitral stenosis.
a) I and III are correct.
b) II and IV are correct.
c) II and III are correct.
d) I and IV are correct.