You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

Example Input: Question: Something with less hydrogen ions would have what pH value? 
 Option1: high 
 Option2: low 
 Explanation: With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH.
Example Output: high

Example Input: Question: If we find something with a low pH value that is likely to be 
 Option1: acidic 
 Option2: basic 
 Explanation: The higher the pH value is, the stronger the base.
Example Output: acidic

Example Input: Question: Mike is digging for old rocks. Mike dig downs very, very deep, and he expects the rocks there to be 
 Option1: older 
 Option2: younger 
 Explanation: Therefore, deeper rock layers must be older than layers closer to the surface.
Example Output:
older