Question

Choose the odd one in each set and name the category to which the remaining three
belong
e.g, Calys, Corolla, Stamen, Midrib ODD-
Midrib
Category-Parts of a flower
Haemoglobin, Glucagon, Iodopsin, Rhodopsin
7. Oxytocin, Insulin, Prolactin, Progesterone.
3. Aqueous humour, Vitreous humour, Iris, Central canal.
4 Lacrimal gland, Thyroid, Liver, Prostate gland
7. Myopia, Concave lens, Eustachian tube, Short sightedness​

Answer 1

Glucagon ( others are pigments )
Insulin ( others are responsible for lactation and pregnancy )
Central canal ( others are found in eye )
Thyroid ( others have ducts )
Eustachian tube ( others are related to eye )