<prompt> Triradiate pelvis is seen in:RicketsChondrodystrophyOsteoporosisHyperparathyroidism  <response>: Contracted pelvis is alteration in size andor shape of pelvis of sufficient degree so as to alter the normal mechanism of labour in an average size baby. It can be a result of malnutrition, diseases or injuries affecting the bone of pelvis or it can be due to any developmental defect. 