Consider the following statements about ethylene                                              

 a) It breaks seed and bud dormancy, initiates germination in peanut seeds and sprouting of potato tubers

b) Ethylene promotes rapid internode/petiole elongation in deep water rice plants

c) Spraying juvenile conifers with ethylene hastens the maturity period, thus leading to early seed production

d) It helps leaves/upper parts of the shoot to remain above water

e) Ethylene controls xylem differentiation and helps in cell division

f) Ethylene also promotes root growth and root hair formation, thus helping the plants to

 increase their absorption surface

How many of the above statements are correct ?