The correct option is C) magnetic resonance imaging
Generally, magnetic resonance imaging (MRI) is done to check for brain tumors and computed tomography (CT) can also be done. Hence, if more than one option can be chosen it will be both the option A)brain computed tomography as well as C) magnetic resonance imaging. If only one option is to be selected it will be option C as MRI is the most widely used technique for testing brain tumor.
