Displacement - time curve for a particle moving in a straight line is shown. Then

Question

$\begin{array}{1 1} \text{Particle has positive acceleration in initial and negative acceleration in later part of motion } \\ \text{Particle has negative acceleration in initial and positive acceleration in later part of motion } \\ \text{Particle has negative acceleration during whole course of motion } \\ \text{Particle has positive acceleration during whole course of motion } \end{array}$