Q.
A. x2 - 16xy - 11y2 -12x + 6y + 21 = 0
B. 3x2 + 16x + 15y2 -4x - 14y - 1 = 0
C. x2 + 16x + 11y2 -12x - 6y + 21 = 0
D. 3x2 + 16x + 15y2 -4x - 14y + 1 = 0
E. None of the above
Correct choice: A
Explanation: