Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

[EX Q]: Problem: p has $ 32 more than what q and r together would have had if both b and c had 1 / 6 of what p has. how much does p have ?
Options: a. $ 44, b. $ 48, c. $ 52, d. $ 56, e. $ 60
[EX A]: b

[EX Q]: Problem: two trains are moving in opposite directions at 60 km / hr and 90 km / hr. their lengths are 1.15 km and 0.6 km respectively. the time taken by the slower train to cross the faster train in seconds is ?
Options: a. 42, b. 9, c. 7, d. 67, e. 15
[EX A]: a

[EX Q]: Problem: x can finish a work in 25 days. y can finish the same work in 20 days. y worked for 12 days and left the job. how many days does x alone need to finish the remaining work ?
Options: a. 2, b. 5, c. 6, d. 7, e. 8
[EX A]:
e