The drawbacks of two kingdom system of classification include:
(a) placing eukaryotic and prokaryotic organisms together in kingdom plantae.
(b) placing unicellular and multicellular organisms together in plantae and animalia.
(c) placing autotrophic and heterotrophic organisms together in kingdom plantae.
(d) creating a separate group for acellular organisms.

• A

  a and d only

• B

  d and b only

• C

  a, b and d only

• D

  a, b and c only