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.

[EX Q]: Question: Would a star that is significantly cooler than the sun, which is outputting blue light which is higher in frequency that the yellow light of the Sun, be 
 Option1: hotter 
 Option2: colder? 
 Explanation: Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.
[EX A]: colder?

[EX Q]: Question: Derek's dad was now at a greater risk of getting a cardiovascular disease, even though nothing about his lifestyle or diet changed. The thing that did change is that his dad is now a 
 Option1: larger age 
 Option2: smaller age 
 Explanation: The older a person is, the greater their chance of developing a cardiovascular disease.
[EX A]: larger age

[EX Q]: Question: A chemist compared two substances in the lab. Which substance will have a higher concentration of hydrogen ions? 
 Option1: the substance with the higher pH 
 Option2: the substance with the lower pH 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
[EX A]:
the substance with the lower pH