Identify the odd one in each of the following and mention what the rest are: (b) Adrenaline; penicillin; insulin; thyroxine.
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Solution
Answer: Penicillin.
Penicillin is an antibiotic produced from fungus Penicillium whereas the rest are hormones.
Adrenaline is produced by the adrenal glands, insulin by pancreas and thyroxine by thyroid gland.