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If the pair of lines ax^2 + 2hxy + by^2 + 2gx + 2fy + c = 0 intersect on the y-axis then

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If the pair of lines ax2 + 2hxy + by2 + 2gx + 2fy + c = 0 intersect on the y-axis then
(a) 2fgh = bg2 + ch2 

(b) bg2 ≠ ch2

(c) abc = 2fgh 

(d) none of these

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(a) : As s = ax2 + 2hxy + by2 + 2gx + 2fy + c = 0 represent a pair of line

2fgh = ch2 + bg2​

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