Here are the answers to your questions about endocrine glands:
(a) The endocrine gland associated with the brain is the pituitary gland.
(b) The gland that secretes digestive enzymes as well as hormones is the pancreas.
(c) The endocrine gland associated with the kidneys is the adrenal gland.
(d) The endocrine gland present in males but not in females is the testes.