Questions

Euclid of Alexandria was a Greek mathematician, often referred to as the Father of Geometry.

The weight of the man mg is acting on the floor. As the lift is moving up with an acceleration, say a, the man too in it is having this acceleration. The force producing this acceleration is ma. By Newton's third law, this force will have an equal reaction pressing the floor equal to ma. Therefore the total resultant reaction on the floor is mg+ma = m(g+a) which is mg, the weight of the man. So (a) is correct.

Ajanta paintings depict scenes from the Jataka Tales. The Jataka tales are a voluminous body of literature native to India. The stories in that are associated with previous births of Gautama Buddha in both human and animal form.

The EKG was invented by Willem Einthoven in 1903 and is used to monitor and analyze past and present heart activity in an individual.