Which of the following sequences is correct for rainfall?

• A

  Slow ascent of air $\rightarrow$ slow condensation $\rightarrow$ heavy downpour
• Correct answer
  B

  Rapid ascent of air $\rightarrow$ large raindrops $\rightarrow$ heavy downpour
• C

  Pressure decreased $\rightarrow$ air compressed $\rightarrow$ heavy downpour
• D

  Descent of air $\rightarrow$ air warmed $\rightarrow$ heavy downpour

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