What is the most common cause of death in patients with pulmonary embolism?
1) Right ventricular failure
2) Respiratory failure
3) Recurrent embolism
4) Hemorrhagic stroke

What is the role of tissue plasminogen activator (tPA) in the treatment of pulmonary embolism?
1) Prevents thrombus formation
2) Dissolves existing thrombi
3) Inhibits platelet aggregation
4) Enhances fibrinolysis

What is the primary mode of diagnosis for Huntington's disease?
1) Brain MRI
2) Genetic testing
3) Clinical examination and family history
4) Cerebral spinal fluid analysis

What is the characteristic gait abnormality seen in patients with advanced Huntington's disease?
1) Festinating gait
2) Spastic gait
3) Ataxic gait
4) Choreic gait

What is the prevalence of Huntington's disease in the general population?
1) 1/1000
2) 1/10,000
3) 1/100,000
4) 1/1,000,000