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ABC is a variable triangle such that A i...

ABC is a variable triangle such that A is (1,2), and B and C lie on the line `y=x+lambda (lambda " is a variable ). Then the locus of the the orthocenter of " Detla ABC` is

A

x+y=0

B

x-y=0

C

`x^2+y^2=4`

D

x+y=3

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The correct Answer is:
D
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