The positive solutions of the equation ax + by + c = 0 always lie in the

Positive solutions of the equation will give us positive values for x and y.

As x and y both are positive it must lie in the 1st quadrant.

A. IN 1st quadrant both x and y are positive.

B. In the 2nd quadrant x is negative and y is positive.

C. in the 3rd quadrant both x and y are negative.

D. In the 4th quadrant x is positive and y is negative.

Hence A is the correct Answer.