Two particles of mass $5\text{kg}$ and $10\text{kg}$ respectively are attached to the two ends of a rigid rod of length $1\text{m}$ with negligible mass. The centre of mass of the system from the $5\text{kg}$ particle is nearly at a distance of:

1. A
   $33\text{cm}$
2. B
   $50\text{cm}$
3. C
   $67\text{cm}$
4. D
   $80\text{cm}$