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.

Q: Question: A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.100, find the original price per kg?

Option A: Rs.2.9

Option B: Rs.2.1

Option C: Rs.2.5

Option D: Rs.2.2

Option E: Rs.2.7

A: Option C
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Q: Question: Sixty percent of the members of a swim club have passed the lifesaving test. Among the members who have not passed the test, 12 have taken the preparatory course and 30 have not taken the course. How many members are there in the swim club?

Option A: 60

Option B: 80

Option C: 100

Option D: 120

Option E: 140

A: Option E
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Q: Question: The sum and the product of two numbers are 12 and 20 respectively, the difference of the number is?

Option A: 1

Option B: 6

Option C: 7

Option D: 8

Option E: 2

A:
Option D
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