Volume of mercury in the bulb of a thermometer is 10^-6m³. Area of cross section of capillary tube is 2 x 10^-7m². 𝛄_Hg = $18\times {10}^{-5}/{}^{0}C$. If Temperature is raised by 100^oC, length of mercury column raised in to the tube is (neglect expansion of glass) 

• A

  9 mm

• B

  9 cm

• C

  18 cm

• D

  18 mm