Statement I: On a rainy day sound travel slower than on a dry day.
Statement II: When moisture is present in air the density of air increases.

• A

  If both statement I and statement II are true and statement II is the correct explanation of statement I.
   

• B

  If both statement I and statement II are true but statement II is not the correct explanation of statement I.
   

• C

  If statement I is true but statement II is false 
   

• D

  If both statement I and statement II are false