<prompt> C cells are present inThyroid glandParathyroid glandPituitary glandThymus  <response>: Cells of the ultimobranchial body give rise to the parafollicular or C cells of the thyroid gland. These cells secrete calcitonin, a hormone involved in regulation of the calcium level in the blood.Reference: Krishna Garg Histology; 5th edition; Page no: 230; 232 