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 at least a 90º angle ?: 
 Options:  <1> H2O. <2> NH3. <3> CH4 <4> SF4. <5> BF3.
