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: The ages of two persons differ by 16 years. If 6 years ago , the elder one be 3 times as old as the younger one, find their present ages .

 Option A: 10 years and 18 years

 Option B: 18 years and 26 years

 Option C: 20 years and 28 years

 Option D: 14 years and 30 years

 Option E: 16 years and 25 years
[EX A]: Option D

[EX Q]: Question: The difference between the place values of 7 and 3 in the number 527435 is

 Option A: 4

 Option B: 5

 Option C: 45

 Option D: 6970

 Option E: None
[EX A]: Option D

[EX Q]: Question: A train running at the speed of 60 km/hr crosses a pole in 15 seconds. What is the length of the train?

 Option A: 120 metres

 Option B: 180 metres

 Option C: 324 metres

 Option D: 250 metres

 Option E: 180 metres
[EX A]:
Option D