Q70) Serotonin and Melatonin are hormones, secreted by A) Pancreas B) Pineal body C) Pituitary gland D) Thymus
Q70) Serotonin and Melatonin are hormones, secreted by A) Pancreas B) Pineal body C) Pituitary gland D) Thymus

Correct option:  B

Explanation: Pineal body secretes Serotonin and Melatonin hormones. Pineal gland is an endocrine gland. The hormone produced by it modulated the pattern of the sleep.