Which of the following statements about viscosity is/are correct? when a ball falls through a viscous liquid?

i. viscosity opposes the gravitational force on the ball.

ii. viscosity opposes the upthrust on the ball.

iii. viscosity is in the same direction as the upthrust on the ball.

iv. as the ball falls faster the more viscous the liquid is

A. i and iii only
B. i and ii only
C. ii and iv only
D. iii and iv only
E. i, ii and iv only

Correct Answer:

Option A – i and iii only