Which one of the following fishes is a surface feeder?

Poultry farming is undertaken to raise following

(i) egg production (ii) feather production

(iii) chicken meat (iv) milk production

Poultry fowl are susceptible to the following pathogens

Animal husbandry is the scientific management of

(i) animal breeding (ii) culture of animals

(iii) animal livestock (iv) rearing of animals

Which one of the following nutrients is not available in fertilizers?