One end of a string of length $l$ is connected to a particle of mass ‘$m$ ’ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed ‘$v$ ’, the net force on the particle (directed towards center) will be: ($T$ represents the tension in the string)

1. A
   $T+\frac{m{v}^2}{l}$
2. B
   $T-\frac{m{v}^2}{l}$
3. C
   Zero
4. D
   $T$