Assertion (A): At some time of the day, the length of the shadow of a tower is equal to its height, then the sun’s altitude is 45°.

Reason (R): The angle which the line of sight makes with the horizontal line passing through the observer’s eye, when the object is above the observer, is called the angle of elevation.

1. A is true, R is false

2. A is false, R is true

3. Both A and R are true

4. Both A and R are false