Triad of exophthalmos, bone lesions, and diabetes insipidus is a feature of: (A) Hand-schuller christian disease, (B) Craniofacial dysostosis, (C) Mickulicz syndrome, (D) Letterer - sieve disease
Answer is A. HSCD is associated with multifocal langerhans cell histiocytosis.
Triad:

Exophthalmos
Lytic bone lesions
Diabetes insipidus.