Assertion (A): A bulge in the middle portion of the earth and flattened top at the poles.

Reason (R): Centrifugal force always directed outward, i.e., away from the axis of rotation.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): In the course of the earth's movement around the sun, the North Pole remains inclined towards the sun for a part of the year while the South Pole is tilted away from it.

Reason (R): The earth rotates on an inclined axis in an elliptical path around the sun.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

The lighted part of the earth is called the :

1. Circle of Light
2. Circle of Illumination
3. Circle of Solstice
4. Circle of Equinox

Perihelion : 147.4 million km :: …………… : 152 million km

1. Aphelion
2. Equinox
3. Solstice
4. All of the above