Identify the incorrect statement from the following.

• A
  Pyramid of biomass in sea is generally inverted as the biomass of fish far exceeds that of phytoplanktons.
• B
  Pyramid of energy is mostly upright, but sometimes it may be inverted.
• C
  Food chains are generally short with few trophic levels as only $10\%$ of the energy is transferred to each trophic level from the lower trophic level.
• D
  Pyramids of number and biomass may be either upright or inverted.