The angle formed in a minor segment of a circle is :

1. an acute angle

2. an obtuse angle

3. a right angle

4. either an acute or an obtuse angle

The angle formed in a major segment of a circle is :

1. an acute angle

2. an obtuse angle

3. a right angle

4. either an acute or an obtuse angle

If two diameters of a circle intersect each other at right angles, then the quadrilateral formed by joining their end points is a :

1. rhombus

2. square

3. rectangle

4. parallelogram

In the given figure, O is the centre of the circle such that ∠AOC = 130°, then ∠ABC is equal to :

1. 65°

2. 90°

3. 105°

4. 115°