Q 2157291184.    

Assertion : The equation `2x^2- 6y^2 + 4z^2 + 18yz + 2zx + xy = 0` represents a pair of perpendicular planes.

Reason : A pair of planes given by `ax^2 + by^2 + cz^2 + 2fyz + 2gzx +2hxy =0` are perpendicular, if `a+b+c= 0`

A Both A and R individually true and R is the correct explanation of A
B Both A and R are individually true but R is not the correct explanation of A
C A is true but R is false
D A is false but R is true

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