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: P alone can complete a piece of work in 14 days. Work done by Q alone in one day is equal to one-third of the work done by P alone in one day. In how many days can the work be completed if P and Q work together?

 Option A: 6 (1/4

 Option B: 21/2 days

 Option C: 7 (3/4

 Option D: 8/5 days

 Option E: 9 (3/4
[EX A]: Option B

[EX Q]: Question: Choose the missing terms out of the given alternatives.
QPO, SRQ, UTS, WVU, ?

 Option A: XVZ

 Option B: ESD

 Option C: ZYA

 Option D: VWX

 Option E: YXW
[EX A]: Option E

[EX Q]: Question: In a group of 250 readers who read science fiction or literacy works or both, 180 read science fiction and 88 read literacy works. How many read both science fiction and literacy works?

 Option A: 268

 Option B: 180

 Option C: 150

 Option D: 18

 Option E: 88
[EX A]:
Option D