This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Ophthalmology
[{'content': 'A child presents with night blindness, delayed dark adaptation. Which investigation is to be done fuher to confirm the diagnosis? \nSelect and explain. \nA. Dark adaptometry, B. ERG, C. EOG, D. Retinoscopy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Retinitis pigmentosa * APOPTOSIS OF RODS * AUTOSOMAL RESSECIVE * AUTOSOMAL DOMINANT * X LINKED - WORST PROGNOSIS C/F* NYCTALOPIA * RING SCOTOMA * TUBULAR VISION O/E- TRIAD * PALE WAXY DISC* ARETRIOLAR ATTENUATION* BONE SPICULE PIGMENTATION ( MOST CHARACTERISTIC ) Gold standard for Dx - ERG EOG - Gold standard for best diseaseRetinoscopy - differentiate between type of refractive error', 'role': 'assistant'}]