A particle of mass $20 \mathrm{g}$ is released with an initial velocity $5 \mathrm{m} {\mathrm{s}}^{-1}$ along the curve from the point $A,$ as shown in the figure. The point $A$ is at height $h$ from point $B.$ The particle slides along the frictionless surface. When the particle reaches point $B,$ its angular momentum about $O$ will be: (Take $g=10 \mathrm{m} {\mathrm{s}}^{-2}$)

• A

  $3\mathrm{ }\mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-1}$
• B

  $2\mathrm{ }\mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-1}$
• Correct answer
  C

  $6\mathrm{ }\mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-1}$
• D

  $8\mathrm{ }\mathrm{kg} {\mathrm{m}}^2 {\mathrm{s}}^{-1}$

Hence, the correct answer is option: 'C'.