Which of the following statements are correct about pollen grains?

a. A detail study of pollen grains is called Palynology.
b. In the Orchidaceae family the pollen grains join together to form bag like "Pollinium".
c. Largest pollen grain is found in Myosotis
d. The exine exhibits a fascinating array of pattern and designs.

• A

  a and b

• B

  b and c

• C

  a, b and d

• D

  a, b, c and d