What is the relation between the plane ax + by + cz + d = 0 and a1, b1 – McqOptions

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1.	What is the relation between the plane ax + by + cz + d = 0 and a₁, b₁, c₁ the direction ratios of a line, if the plane and line are parallel to each other?
A.	a<sub>1</sub>a<sub>2</sub> . b<sub>1</sub>b<sub>2</sub> . c<sub>1</sub>c<sub>2</sub> = 0
B.	a<sub>1</sub>a + b<sub>1</sub>b + c<sub>1</sub>c = 0
C.	a<sub>1</sub>a<sub>2</sub> + b<sub>1</sub>b<sub>2</sub> c<sub>1</sub>c<sub>2</sub> = 0
D.	a<sub>1</sub>a<sub>2</sub> + b<sub>1</sub>b<sub>2</sub> c<sub>1</sub>c<sub>2</sub> = 0
Answer» C. a<sub>1</sub>a<sub>2</sub> + b<sub>1</sub>b<sub>2</sub> c<sub>1</sub>c<sub>2</sub> = 0

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