A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described by

When a body is dropped in a liquid, at first, the dominating weight will lead to increase in its velocity but at certain velocity the forces on it gets balanced resulting the body to move with constant velocity there after. All these processes are subsequen as all forces are conservative there will not be any jerk in the journey so, the correct graph.