Rheumatic heart disease is a condition that can occur as a result of untreated strep throat or scarlet fever. It is characterized by inflammation and damage to the heart valves. The correct treatment for rheumatic heart disease is the use of penicillin, which is option 4. Penicillin is an antibiotic that is effective in treating the streptococcal infection that causes the disease. It helps to eradicate the infection and prevent further damage to the heart. Aspirin, which is option 1, can be used to manage symptoms such as inflammation and pain in the joints, but it is not the primary treatment for the disease itself. Options 2 and 3, streptomycin and methyl dopa, are not commonly used in the treatment of rheumatic heart disease.