In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Ex Input:
Question: A drug with a seemingly monocompartmental distribution pattern is administered in the form of i.v. perfusion. at a constant speed of 20 mg / h for 48 h. Once the perfusion is finished, three blood samples are taken, which, when analyzed, allow the calculation of the primary parameters of the model Kel = 0.0495 h-1, concentration at the end of the perfusion (C48h) = 5,553 μg / mL, Vd = 66 L. At what time would the steady state be reached ?: 
 Options:  <1> 14 h. <2> 28 h. <3> 42 h. <4> 56 h. <5> 70 h.

Ex Output:
5


Ex Input:
Question: A patient with peripheral occlusive arteriopathy who presents intermittent claudication will be recommended: 
 Options:  <1> Absolute rest to reduce the demands of O2. <2> Elevate the legs to reduce pain. <3> Apply dry heat to the legs to promote vasodilation. <4> Walk on flat surfaces. <5> Use gradual compression stockings.

Ex Output:
4


Ex Input:
Question: The solubility of copper hydroxide in the presence of a high concentration of ammonia: 
 Options:  <1> Increased by formation of a complex ion of Cu2 + with NH3. <2> It is not affected because there is no common ion effect. <3> Decreases by common ion effect. <4> It decreases upon oxidation of bromide to molecular bromine. <5> It decreases because the hydroxides are more soluble in acidic medium.

Ex Output:

1