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 Input:
Question: If Mona is examining her arteries and she looks at ones that are farther away from her heart, what happens to the size of the arteries?
Option1: smaller
Option2: larger
Explanation: Further away from the heart, the aorta branches into smaller arteries, which eventually branch into capillaries.

Ex Output:
smaller

Ex Input:
Question: When we are trying to move through the thermosphere the lower we go the _____ it will feel
Option1: colder
Option2: warmer
Explanation: In the thermosphere, temperatures increase as altitude increases.

Ex Output:
colder

Ex Input:
Question: Eric has a hydrocarbon with 20 carbon atoms. Rita has a hydrocarbon with 35 carbon atoms. Whose hydrocarbon has fewer isomers?
Option1: Eric
Option2: Rita
Explanation: The more carbon atoms a hydrocarbon has, the greater the number of isomers.

Ex Output:
Eric