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 Q]: Question: It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train to that of the car is?

 Option A: 3:4

 Option B: 7:6

 Option C: 1:4

 Option D: 5:4

 Option E: 2:4
[EX A]: Option A

[EX Q]: Question: A combustion reaction forms carbon dioxide. A carbon dioxide molecule contains one carbon and two oxygen atoms. If, over a period of 10 minutes, a combustion reaction creates 10,000 molecules of carbon dioxide then approximately how many more atoms of oxygen than carbon are created on average per minute?

 Option A: 1,000

 Option B: 500

 Option C: 250

 Option D: 50

 Option E: 0
[EX A]: Option A

[EX Q]: Question: When 0.232323..... is converted into a fraction, then the result is

 Option A: 23/99

 Option B: 24/99

 Option C: 25/99

 Option D: 22/99

 Option E: 20/99
[EX A]:
Option A