Exine of pollen is
(A) Hard outer layer of pollen grain
(B) Most resistant organic matter known.
(C) Layer made up of sporopollenin.
(D) Layer which can withstand high temperature, strong acids and alkali.
(E) Layer which cannot be degraded by any known enzyme.
Option 1 : A and B
Option 2 : A, B, C and D
Option 3 : A, B, C, D and E
Option 4 : A, C and E
