Choose correct statement for ethylene and mark correct option :

i) It has specific effects on cytokinesis

ii) It is a modified form of adenine

iii) It does not occur naturally in plants

iv) Isolated from coconut milk

v) It is highly effective in fruit ripening

vi) It enhances the respiration rate during ripening of the fruits

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