Which of the following are glands without ducts?

The correct options are
A

Endocrine glands

B

Exocrine gland

C

Heart

Glands without ducts are called "ductless" or "endocrine" glands. They release their secretions directly into the bloodstream. The pituitary is the master endocrine gland which regulates the secretions of other endocrine glands such as the pancreas, thyroid gland, gonads, adrenal glands, etc. The secretions of endocrine glands are called hormones.