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: The product of the prime integers between 23 and 35, inclusive, is:

 Option A: 50! – 40!

 Option B: 99,029

 Option C: 2,303

 Option D: 22,011

 Option E: 2,000
[EX A]: Option D

[EX Q]: Question: A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4: 5. Find the quantity of alcohol in the given mixture

 Option A: 15 litres

 Option B: 10 litres

 Option C: 30 litres

 Option D: 22 litres

 Option E: 8 litres
[EX A]: Option B

[EX Q]: Question: A man spends Rs. 1600 per month on an average for the first three months, Rs 1550 for next four months and Rs. 1800 per month for the last five months and saves Rs . 2800 a year. What is his average monthly income?

 Option A: 1900

 Option B: 2010

 Option C: 2100

 Option D: 2200

 Option E: 2300
[EX A]:
Option A