Male sex organ is stamen and the female sex organ is carpel or pistil in these plants. They produce female gametophyte made of egg apparatus, antipodal cells and polar nuclei and male gametophyte made of tube cell and two male gametes. Which of the following is also a very important unique event occuring in these plants:
| A. |
Formation of haploid endosperm for providing nourishment to developing embryo |
| B. |
Double fertilisation and triple fusion |
 |
| C. |
Presence of vascular tissue and formation of seeds |
| D. |
Both B & C |