If the mid-point of the line segment joining the points P(a, b - 2) and Q(-2, 4) is R(2, -3), then the values of a and b are

1. a = 4, b = -5

2. a = 6, b = 8

3. a = 6, b = -8

4. a = -6, b = 8

The point which lies on the perpendicular bisector of the line segment joining the points A(-2, -5) and B(2, 5) is

1. (0, 0)

2. (0, 2)

3. (2, 0)

4. (-2, 0)

The fourth vertex D of a parallelogram ABCD whose vertices are A(-2, 3), B(6, 7) and C(8, 3) is

1. (0, 1)

2. (0, -1)

3. (-1, 0)

4. (1, 0)

The point which divides the line segment joining the points (7, -6) and (3, 4) in the ratio 1 : 2 internally lies in the

1. Ist quadrant

2. IInd quadrant

3. IIIrd quadrant

4. IVth quadrant