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: Which of the following molecules has a simple covalent bond? 
 Options:  <1> C2. <2> N 2 <3> O 2 <4> O 3. <5> F 2
