Water is filled in a tank up to a height of 20 cm from the bottom of the tank. Water flows through a hole of area $1 \mathrm{~mm}^2$ at its bottom. The mass of the water coming out from the hole in a time of 0.6 s is (Density of water $=1000 \mathrm{~kg} \mathrm{~m}^{-3}$ and acceleration due to gravity $=10 \mathrm{~ms}^{-2}$ )

• A

  1.8 g
• Correct answer
  B

  1.2 g
• C

  0.6 g
• D

  2.4 g

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