According to ABCDE model of flower development, different combinations of MADS box proteins belonging to class A, B, C, D and E bind to each other to form a tetrameric structure referred to as "floral quartet" as given below. The floral quartet bind to DNA to activate transcription of the genes needed to specify each floral organ types.
AP1 = APETALA 1, AP3 = APETALA 3, PI = PISTILLATA, AG = AGAMOUS STK = SEEDSTICK, SHP SHATTERPROOF, SEP = SEPALLATA 1/2/3
Which one of the following options represents the combination of floral quartets that specify petals and carpel whorl of flower, respectively?
1
B and E
2
C and D
3
A and B
4
D and E