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.
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Question: Question: In the xy-plane, line q passes through point (3,-2) and intersect perpendicularly with line n that passes through points (0,3) and (3,5). What is the equation of line q?

Option A: 3x+2y-5=0

Option B: 3x+2y+5=0

Option C: 2x-3y-12=0

Option D: 2x+3y=0

Option E: 4x+3y-6=0

Answer: Option A

Question: Question: On an order of 5 dozen boxes of a consumer product, a retailer receives an extra dozen free. This is equivalent to allowing him a discount of:

Option A: 15%

Option B: 16 1/6%

Option C: 16 2/3%

Option D: 20%

Option E: 30%

Answer: Option C

Question: Question: A certain sum of money at simple interest amounted Rs.850 in 10 years at 3% per annum, find the sum?

Option A: 651.85

Option B: 652.85

Option C: 653.85

Option D: 654.85

Option E: 655.85

Answer:
Option C