Unknown General f8ad7d87 A 47-year-old woman with generalized tiredness and weight gain especially around waist. Patient is also intolerant to the room temperature. The next investigation to be done? A Radioiodine scan B Thyroid stimulating hormone (TSH) C Total tetraiodothyronine level (T4) D Tri-iodothyronine level (T3) High-Yield Explanation No explanation provided.