b)Given below are five sets with four terms each.Identify the odd one in each set and name
the category to which the remaining three belong : (5)
i. Adenine, Guanine, Pentose sugar, Thymine
ii. G1- phase, Metaphase, S-phase, G2- phase
iii. Iris, Stapes, Cornea, Retina
iv. Cretinism, Acromegaly, Thyphoid, Gigantism
v. Cyton, Photon, Axon, Dendro

Dear student,
Please find below the answer:

i. Pentose sugar. Rest all are nitrogenous bases.
ii. Metaphase. It is a phase in mitosis and meiosis and rest all are phases of the cell cycle.
iii. Stapes. It is present the ear. Rest all are parts of the eye.
iv. Typhoid. It is a microbial disease. Rest all are hormonal diseases.
v. Photon. Rest all are parts of the neuron.

Hope this clears your doubt.
Regards.