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A line through (1, 2, 3) and (3, 4, 5) has direction ratios proportional to:
A2, 3, 4
B1, 1, 1
C3, 4, 5
D1, 2, 3
Answer & Solution
Correct answer: B. 1, 1, 1
The differences are 2, 2, 2, which are proportional to 1, 1, 1.
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