The correct option is B 1- c, 2- d, 3- b, 4- a
Rhacophorus is a genus of frogs which are the true tree frogs. These frogs are also referred to as flying frogs. So, 1 matches with c.
Amphiuma is a genus of aquatic salamanders and are also known to fisherman as conger eels or congo snakes. So, 2 matches with d.
Megalobatrachus is a genus of giant salamander and these are the largest salamanders and largest amphibians. So, 3 matches with b
The genus Hyla is a member of the family of tree frogs. So, 4 matches with a.
Therefore, the correct answer is option B.