Which Mechanism Is Responsible for the Therapeutic Effect of Sildenafil

Which mechanism is responsible for the therapeutic effect of sildenafil?

A) inhibition of acetylcholine degradation
B) activation of muscarinic acetylcholine receptors
C) inhibition of cyclic GMP degradation
D) stimulation of nitric oxide synthesis
E) stimulation of potassium efflux

Correct Answer:

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