Gene bank is a type of biorepository which preserves genetic material for the future purpose. For plants, this could be by freezing cuttings from the plant, or stocking the seeds (e.g., in a seed bank). For animals, this is the freezing of sperm and eggs in zoological freezers until further need. With corals, fragments are taken which are stored in water tanks under controlled conditions. Types of gene banks include seed bank, tissue bank, cryobank, pollen bank, field gene bank etc. Thus, the correct answer is option A.