Answer:
A. Acute rheumatic fever.
Explanation:
Acute rheumatic fever is an autoimmune response to the infection of bacteria called group A streptococcus. This infection commonly occurs in children and particularly after 2 to 3 weeks of pharyngitis or sore throat. It has manifestations of cardiac (murmur), rheumatologic, and neurologic.
So, the above symptoms shown in question is purely related to acute rheumatic fever.