<prompt> Kamla, age 48 yrs, presents with unilateral mild axial proptosis. There is no redness or pain. Investigation of choice is :T3 T4 measurements to rule out thyrotoxicosisCT scan to rule out meningiomaDoppler to rule out hemangiomaUSG to rule out orbital pseudotumor  <response>: A i.e. T3 T4 measurement to rule out thyrotoxicosis 