The third choice is correct
Answer: The ray that passes through the focal point on the way to the lens will refract and travel parallel to the principal axis. ... All three rays should intersect at exactly the same point.
Explanation: Once these incident rays strike the lens, refract them according to the three rules of refraction for converging lenses.
You need to know how much friction that object.
The density of the body and the height or the depth of the body since the formula of liquid pressure is density x height gravity
