The correct option is D None of these
The following cases will arise
Case 1: x > 0
x2 + 5x + 6 = 0
On solving we get x = -2, -3 which is not possible as x > 0.
Case 2: x < 0
x2 - 5x + 6 = 0
On solving we get x = 2, 3 which is not possible as x< 0.
So no real root is possible. Option (d) is correct.