Which of the following statement is not true? <br> 1. The velocity in uniform motion doe not depend upon the time interval <br> 2. External force is required for an object to be in uniform motion <br> 3. For a uniform motion along a straight line in a given direction, the magnitude of the displacement is not equal to the actual distance covered by the object. <br> 4. The average speed is equal to the arithmetic mean of individual speeds.

Question

$\begin{array}{1 1} (a)\; \text{1 and 2} \\ (b)\; \text{2 and 3} \\ (c)\; \text{3 and 4} \\ (d)\; \text{1 and 4} \end{array}$