The correct answer is option A Liquid X is more viscous than Liquid Y
When Rosa fills the cylinder with two different kinds of fluid and then drops a ball into the liquid.
The ball reaches the bottom of the liquid Y first as compared to the liquid X because the viscosity of the liquid X is more than the viscosity of the liquid Y.
Viscosity can be defined as the state of being thick, semi-fluid in consistency, stick, due to which a fluid has a ability to flow.