Task: Question Answering
Input (English): Question: Indicate the correct option regarding the defined daily dose of a medicine: 
 Options:  <1> Corresponds to the maximum daily dose. <2> Corresponds to the initial dose of a treatment. <3> Corresponds to the maintenance dose for the indication that requires a lower dose. <4> Corresponds to the average daily maintenance dose. <5> Corresponds to the initial dose for the main indication.
Output (English): 4