Major and important differences between carbon and phosphorus cycle are:

a. Atmospheric inputs of phosphorus through rainfall are much smaller than carbon inputs

b. Phosphorous has its reservoir in the atmosphere whereas carbon reservoir is mostly found in rocks.

c. Gaseous exchanges of phosphorus between organism and environment are negligible

• A

  a and b

• B

  b and c

• C

  a and c

• D

  a, b and c