You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Ex Input:
Question: Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank?

Option A: 14 min 19 sec

Option B: 14 min 42 sec

Option C: 14 min 20 sec

Option D: 14 min 40 sec

Option E: 14 min 10 sec

Ex Output:
Option D

Ex Input:
Question: In a test, sixty percent students passed in Maths and 65% in History, 40% passed in both of these subjects. If 90 students failed in maths and history both, then what is the total number of students?

Option A: 600

Option B: 650

Option C: 700

Option D: 750

Option E: None of these

Ex Output:
Option A

Ex Input:
Question: There are 2 sections A and B in a class, consisting of 36 and 24 students respectively. If the average weight of section A is 30kg and that of section B is 30kg, Find the average of the whole class?

Option A: 30kg

Option B: 37kg

Option C: 42kg

Option D: 55.12kg

Option E: 29.78kg

Ex Output:
Option A