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: How much time will it take for an amount of Rs. 900 to yield Rs. 81 as interest at 4.5% per annum of simple interest?

 Option A: 2 years

 Option B: 3 years

 Option C: 1 year

 Option D: 4 years

 Option E: 5 years
Option A

Question: A father was as old as his son's present at the time of your birth. If the father's age is 44 years now, the son's age 5years back was?

 Option A: 10 years

 Option B: 12 years

 Option C: 14 years

 Option D: 16 years

 Option E: 17 years
Option E

Question: A gym offers 11 levels of fitness classes, and in an attempt to reward those who progress toward higher levels of fitness it charges $50 less per course for each level of fitness. Jessica completed all 11 levels by taking one course at each level, and her total cost was $4675. What is the cost Q for a course at the gym's highest level?

 Option A: $175

 Option B: $245

 Option C: $425

 Option D: $675

 Option E: $725

Option A