Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

The correct option is B Auxin and ethylene
Auxin is required for flowering in pineapple while ethylene is required to initiate flowering and for production of synchronised fruit set in pineapple. Thus, auxin and ethylene can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield.