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'.

Input: Consider Input: Question: Which of the following conditions causes a decrease in the O2 saturation of the hemoglobin that is not due to a decrease in the partial pressure of oxygen? 
 Options:  <1> Ventilation-perfusion ratio lower than normal. <2> Anemia. <3> Carbon monoxide poisoning. <4> Hypoventilation. <5> Shunt venoarterial.

Output: 3


Input: Consider Input: Question: Graphite is a conductor because: 
 Options:  <1> The valence band has electronic vacancies. <2> The driving band has electronic vacancies. <3> Both bands have electronic vacancies. <4> The banned band is very big. <5> The band gap is zero.

Output: 5


Input: Consider Input: Question: The lithium aluminum hydride reacts with the carboxylic acids to give: 
 Options:  <1> Esters. <2> Ketones <3> Tertiary alcohols. <4> Secondary alcohols <5> Primary alcohols.


Output: 5