Which of the following is correct about flower? 
A. Reproductive unit in angiosperm. 
B. Calyx and corolla are reproductive organs. 
C. Typical flower has four kinds of whorls. 
D. Whorls arranged successively on thalamus or receptacle. 

• A

  All except C 

• B

  All except D 

• C

  All except B 

• D

  All except A