A 78-year-old man with type 2 diabetes on insulin is found confused and sweaty on the ward. Capillary glucose is 2.4 mmol per litre. He is conscious but drowsy and able to swallow. What is the most appropriate immediate treatment?AGive oral fast-acting carbohydrate such as glucose tablets or sugary drinkBGive intramuscular Glucagon only if he becomes unconsciousCStop insulin and observe without treatmentDGive a large dose of long-acting insulinEStart intravenous potassium replacement onlyCheck my answer