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: Find the equation of a line which passes through A(4, -1) and is parallel to x axis.

Option A: y=-2

Option B: y=3

Option C: y=2

Option D: y=-1

Option E: y=0

Answer: Option D

Question: Question: If N = 2^0.1 and N^b = 16, b must equal

Option A: 3/80

Option B: 3/5

Option C: 40

Option D: 5/3

Option E: 80/3

Answer: Option C

Question: Question: A man's speed with the current is 20 kmph and speed of the current is 3 kmph. The Man's speed against the current will be

Option A: 11 kmph

Option B: 12 kmph

Option C: 14 kmph

Option D: 17 kmph

Option E: None of these

Answer:
Option C