A vessel of volume V is half filled with a liquid of density 2d and coefficient of apparent expansion 2x. The other half is filled another liquid of density ‘d’ and coefficient of apparent expansion ‘x’. When temperature is increased by $4^{\circ }\mathrm{C}$, mass of liquid expelled is 
 

• A

  $12\mathrm{V} \mathrm{x} \mathrm{d}$

• B

  $6\mathrm{V} \times \mathrm{d}$

• C

  $3\mathrm{V} \times \mathrm{d}$

• D

  $18\mathrm{V} \times \mathrm{d}$