Which of the following endocrine glands is unpaired?
(a) Adrenal
(b) Testes
(c) Pituitary
(d) Ovary
(c) Pituitary
Explanation: Except pituitary, all endocrine glands given here are paired in nature. Adrenal glands are paired and present on the top of each kidney. The testes are a paired gland in males which produces male sex hormones. Ovary is a paired gland in females, which produces female sex hormones. The pituitary gland is unpaired and present below the brain. It is also called as master gland as it secretes a number of hormones.