Answer:
Option (c).
Explanation:
An object when when projected at an angle, will have some horizontal velocity and vertical velocity such that,

is the angle of projection
The horizontal component of the projectile remains the same because there is no horizontal motion. Vertical component changes at every point.
As a projectile falls, vertical velocity increases in magnitude, horizontal velocity stays the same
.
This is a question that would have literally have taken two seconds to look up on google but the answer is 1.88 years.
The answer is either C or D..
Well it transports white blood cells to infected areas.