Task: Text Categorization
Input (English): Question: Heparin is: 
 Options:  <0> A plasma protein with no net charge with coagulant function. <1> A glycosaminoglycan with high density of sulphate groups in its structure and anticoagulant function. <2> A protease that facilitates the transformation of prothrombin into thrombin. <3> An extracellular matrix protein with no net charge, which gives rise to highly viscous solutions with a lubricating function. <4> A homopolysaccharide with anticoagulant function thanks to the high density of positive charges in its structure.
Output (English): pharmacology