The equation `xy=0` in three dimensional space is represented by (A) a plane (B) two planes at righat angles (C) a pair of parallel planes (D) a pair of straighat lines

The equation (x-1)(x-2)=0 in thre dimensional space is represented by (A) a pair of straighat lines (B) a pair of parallel planes (C) a sphere (D) none of these

The equation (x-1)(x-2)=0 in thre dimensional space is represented by (A) a pair of straighat lines (B) a pair of parallel planes (C) a sphere (D) none of these

The equation (x-1)(x-2)=0 in thre dimensional space is represented by (A) a pair of straighat lines (B) a pair of parallel planes (C) a sphere (D) none of these

The equation x^2-x-2=0 in three dimensional space is represented by (A) a pair of parallel planes (B) as pair of straight lines (C) a pair of perpendicular planes (D) a set containing two distinct points

The equation x^2-x-2=0 in three dimensional space is reresented by (A) a pair of parlle planes (B) as pair of straigh lines (C) a pair of perpendicular planes (D) a set contasining two distinct points

In three dimensional space, x=0 represents the equation of-

The eqution xy+yz=0 represents (A) a pair of straighat lines (B) a pair of parallel lines (C) a pair of parallel planes (D) a pair of perpendicular planes

The equation xy+yz=0 represents (A) a pair of straight lines (B) a pair of parallel lines (C) a pair of parallel planes (D) a pair of perpendicular planes

In three dimensional space the equation of xy-plane is-