Kamla, age 48 yrs, presents with unilateral mild axial proptosis. There is no redness or pain. Investigation of choice is :
A i.e. T3 & T4 measurement to rule out thyrotoxicosis
T3 &T4 measurements to rule out thyrotoxicosis
CT scan to rule out meningioma
Doppler to rule out hemangioma
USG to rule out orbital pseudotumor