JEE Main 2008 Mathematics question on Straight Lines and Pair of Lines

1. A.
   four straight lines, when $c = 0$ and $a$, $b$ are of the same sign
2. B.
   two straight lines and a circle, when $a = b$ and $c$ is of sign opposite to that of $a$
3. C.
   two straight lines and a hyperbola, when $a$ and $b$ are of the same sign and $c$ is of sign opposite to that of $a$
4. D.
   a circle and an ellipse, when $a$ and $b$ are of the same sign and $c$ is of sign opposite to that of $a$

[AIEEE 2008]