Definition: 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: Question: Vitamin K is the specific antagonist for: 
 Options:  <1> Oral anticoagulants <2> Insulin. <3> Paracetamol. <4> Heparin. <5> Opiates
