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: 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
Option E

Question: A particular library has 75 books in a special collection, all of which were in the library at the beginning of the month. These book are occasionally loaned out through an inter-library program. If, by the end of the month, 65 percent of books that were loaned out are returned and there are 68 books in the special collection at that time, how many books of the special collection were loaned out during that month?

 Option A: 20

 Option B: 30

 Option C: 35

 Option D: 40

 Option E: 55
Option A

Question: In a group of ducks and cows, the total number of legs are 26 more than thrice the number of heads. Find the total number of cows.

 Option A: A

 Option B: B

 Option C: C

 Option D: D

 Option E: E

Option B