<prompt> Most common primary intraocular tumor in childrenRetinoblastomaMalignant melanoma of choroidMalignant melanoma of ciliary bodyRhabdomyosarcoma  <response>: Ans. a RetinoblastomaRef: Kanski 7e, p. 510Retinoblastoma - most common intraocular tumor in children.Rhabdomyosarcoma - most common orbital malignant tumor in children. 