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: A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?

Option A: 160 km

Option B: 180 km

Option C: 200 km

Option D: 220 km

Option E: None
[EX A]: Option B

[EX Q]: Question: The average marks obtained by 120 cndidates in a certainexaminationis 35.if the average marks of passed candidate is 39 and that ofthe failed candidates is 15,what is the no. of candidates who passed the examination

Option A: 14 years

Option B: 14 years 3 month

Option C: 14 years 8 month

Option D: 15 years 8 month

Option E: 16 years 2 month
[EX A]: Option C

[EX Q]: Question: A train crosses a platform of 100 m in 15 sec, same train crosses another platform of length 250 m in 20 sec. then find the length of the train?

Option A: 150

Option B: 88

Option C: 77

Option D: 62

Option E: 350
[EX A]:
Option E