A 45-year-old lady is admitted to the acute medical ward after presenting with blurred vision, weakness and blackouts which occurred when she fasted for long periods. Blood sugar was low and C-peptide was raised. After glucose administration, she appeared to improve. What diagnostic test would you perform next to confirm your suspected diagnosis? Select the SINGLE most appropriate option from the list below. Select ONE option only.
A 45-year-old lady is admitted to the acute medical ward after presenting with blurred vision, weakness and blackouts which occurred when she fasted for long periods. Blood sugar was low and C-peptide was raised. After glucose administration, she appeared to improve. What diagnostic test would you perform next to confirm your suspected diagnosis?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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