'Nymph’ is related to ‘Cockroach’ in the same way as ‘Tadpole’ is related to ‘_________’

Insect Cow Bird Frog

Frog

'Nymph’ is related to ‘Cockroach’ in the same way as ‘Tadpole’ is related to ‘_________’ The logic followed here is : Nymph is a young form of Cockroach Similarly Tadpole is young form of Frog