is this correct relationship between velcoty, acceleration and displacement?

question:

the ans is C and i just want to make sure my idea of whats occuring makes sense: for max(terminal) Velocity on R, acceleration is at a minimum (zero) on Q, for an increasing (positive slope) of Displacement on P.

Maximum velocity does not mean terminal velocity in this question. In this question, maximum velocity just means zero acceleration NOT minimum acceleration at that particular time for the acceleration-time graph and maximum gradient NOT increasing slope at that particular time for the displacement-time graph.

I again. Thanks for the response (it helped). Found a similar question where the answer is C, have I labelled it correctly?

Not sure why you placed C on the displacement-axis and D in the bottom right corner.

C should be in the bottom right corner and D on the velocity-axis or bottom left corner.