instruction:
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.
question:
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
answer:
Option B

question:
Question: A batsman scored 90 runs which included 2 boundaries and 7 sixes. What percent of his total score did he make by running between the wickets.

Option A: 30%

Option B: 40%

Option C: 44.44%

Option D: 60%

Option E: 80%
answer:
Option C

question:
Question: If there are 9 horizontal lines and 9 vertical lines in a chess board, how many rectangles can be formed in the chess board?

Option A: 1200

Option B: 1245

Option C: 1296

Option D: 1340

Option E: 1450
answer:
Option C