Which of the following is wrong ?

a. Germ pore of pollen lack sporopollenin

b. Pollen grains are well preserved as fossils because of the presence of sporopollenin

c. The exine of pollen grains of different species exhibit a fascinating array of same type of patterns and designs

• A

  a only 

• B

  b only

• C

  a and b

• D

  c only