The pupa of mosquito is known as tumbler. The adult stage of butterflies is known as the imago. Chrysalis is the pupa stage of moth or butterfly. This is the term derived from a Greek word meaning gold. The chrysalis is held with the help of silk pad and abdominal hook. In many species, the chrysalis is transparent. Maggot is the larva of the fly.
Thus, the correct answer is option C.