A patient is prescribed 40 mg/day of Fluoxetine, administered once daily. If Fluoxetine is available in 20 mg capsules, how many capsules should the patient take each day?

Choice A reason: Zero capsules means the patient would not receive treatment. Choice B reason: Three capsules equal 60 mg, which is an overdose compared to the prescribed 40 mg. Choice C reason: One capsule equals 20 mg, which is only half the prescribed daily dose. Choice D reason: Two capsules equal 40 mg, which matches the prescribed dose exactly.