In a circle, chord AB subtends an angle of 75° at the circumference at point C. A tangent is drawn at point A. If the angle between this tangent and chord AC is 40°, what is the measure of the angle subtended by the minor arc AC at the center of the circle?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?