The correct answer is Study of reptiles and amphibians.Herpetology is the study of reptiles and amphibians.The study of pancreas, liver, biliary tree, gall bladder, and their disorders is known as Hepatology.Additional InformationOrnithology: The branch of zoology that deals with the study of birds is called ornithology.Entomology: It is known as the study of insects.Ichthyology:Ichthyology is the branch of zoology that deals with the study of fish, including bony fish, cartilaginous fish, and jawless fish.The study of fish dates from the Upper Paleolithic Revolution.The science of ichthyology was developed in several interconnecting epochs, each with various significant advancements.The study of fish receives its origins from humans' desire to feed, clothe, and equip themselves with useful implements.