Two line l and k intersect at a point (4, 3). Is the product of their slopes -1?

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Two line l and k intersect at a point (4, 3). Is the product of their slopes -1?

(1) x intercepts of line l and k are positive
(2) y intercept of line l and k are negative


OA B

Source: Princeton Review

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Ans should be C and NOT B as presently given

https://www.manhattanprep.com/gmat/foru ... -t882.html