One end of a metal rod of length $1.0 \ m$ and area of cross-section $100 \ cm^2$ is maintained at $100^{\circ}C$. If the other end of the rod is maintained at $0^{\circ}C$,the quantity of heat transmitted through the rod per minute is (Coefficient of thermal conductivity of the material of the rod = $100 \ W/m-K$).

• A
  $3 \times 10^3 \ J$
• B
  $6 \times 10^3 \ J$
• C
  $9 \times 10^3 \ J$
• D
  $12 \times 10^3 \ J$