Under which one of the following conditions are the lines `x = ay + b; z=cy+d` and `x=ey+f; z=gy+h `perpendicular?

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Q 2703291148.     Under which one of the following conditions are the lines `x = ay + b; z=cy+d` and `x=ey+f; z=gy+h `perpendicular?
NDA 2017 Paper 1 April
A

`ae+cg-1=0`

B

`ae+ bf -1 = 0`

C

`ae+cg+1=O`

D

`ag+ce+ 1 = 0`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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