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: An increase in blood pressure between 80 and 150 mmHg increases diuresis because: 
 Options:  <1> The glomerular filtration increases exponentially. <2> Decreases the peritubular reabsorption of water. <3> The efferent arteriole contracts. <4> Proportionally increases renal blood flow. <5> The afferent arteriole contracts.

Ex Output:
2


Ex Input:
Question: Acetyl-CoA: 
 Options:  <1> It is synthesized from pyruvate in the eukaryotic cytoplasm. <2> It has a phosphate bond rich in energy. <3> Presents a guanine nucleotide in coenzyme A. <4> Activates pyruvate carboxylase and inhibits pyruvate dehydrogenase. <5> It easily crosses the mitochondrial inner membrane.

Ex Output:
4


Ex Input:
Question: Which of the following molecules has the highest number of antibonding electrons? 
 Options:  <1> B2. <2> N 2 <3> Li2. <4> F 2 <5> O 2

Ex Output:

4