Which of the following velocity-time graphs is physically not possible?

The given graph shows the variation of velocity $(v)$ with position $(x)$ for a particle moving along a straight line. Which of the following graphs shows the variation of acceleration $(a)$ with position $(x)$?

The displacement of a particle as a function of time is shown in the figure. It indicates:

Which of the following curves does not represent motion in one dimension?

The acceleration-time graph of a particle moving along a straight line is shown. At what time does the particle acquire its initial velocity? (in $s$)

For a body moving along a straight line, the following $v-t$ graph is obtained. According to the graph, the displacement during