Triradiate pelvis is see in:
Ans. is c, i.e. OsteoporosisOsteomalacia or deficiency of Calcium and Vitamin D shows triradiate pelvis. Since osteomalacia is not given here we are going for osteoporosis.
Rickets
Chondrodystrophy
Osteoporosis
Hyperparathyroidism
Fetal Skull and Maternal Pelvis