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 car takes 3hrs less than a truck to cover the distance frm Bombay to pune(192 km). The speed of the truck is 16km/hr slower than car.Find the speed of the car?

 Option A: 40.38

 Option B: 38.38

 Option C: 41.3

 Option D: 48

 Option E: 45
[EX A]: Option A

[EX Q]: Question: A and B together can do a work in 3 days. If A alone can do it in 12 days. In how many days can B alone do it?

 Option A: 4

 Option B: 6

 Option C: 8

 Option D: 10

 Option E: 25
[EX A]: Option A

[EX Q]: Question: If the selling price is hexatrupled, the profit is septupled, what is the percentage of profit??

 Option A: 50%

 Option B: 100%

 Option C: 150%

 Option D: 200%

 Option E: 250%
[EX A]:
Option B