Question

Pelvic fins of bony fish are
(a) Near tail
(b) Near ventral fins
(c) In middle
(d) Anterior below pectoral fins

Answer 1

Hint: These are usually located behind the head one on each side and they are a pair of fins. It is typically corresponding to the forelimbs of higher vertebrates like in fishes.

Complete answer:
Pelvic fins are paired (also known as ventral fins) and are generally situated behind the pectoral fins at the anterior side, in other words, it is located on the bottom of the fish in front of the anal fin. In many fishes, the pelvic fins are positioned in front of the pectoral fins like in cods. They work as hindlimbs for tetrapods. Pectoral fins are called fish's arms as they help in fine movements like turning sharply and stopping quickly, balance the fish, and keep it in the level by assisting the fish in going up or down through the water. It also prevents it from rolling support from side to side. In some, the pelvic fins are fused into a single sucker disk that helps them to attach to objects like in gobies. This fin may take many positions along the ventral surface like in minnows the ancestral abdominal position, in sunfish, the thoracic position is seen, and in burbot, the jugular position which is when pelvic fins are anterior to the pectoral fins is seen.
So, the correct answer is 'Anterior below pectoral fins'.

Note: Bony fish belong to a group called Osteichthyes and are divided into ray-finned and lobe-finned fish. Ray-finned form an extremely diverse and abundant group with over 30,000 species. Whereas lobe-finned fish are abundant and only eight living species as these days are extinct. Bony fish have fins, swim bladders, rays called lepidotrichia, and operculum that help them breathe.