Stroke Diagnosis: Identifying the Lesion Location in a 48-Year-Old Male

The correct option is C. The right internal capsule.

The patient's presentation of rightward gaze, central paralysis of the left side of the face and tongue, and partial paralysis of the left limb are indicative of a stroke. The fact that he has a history of hypertension for 6 years also increases the likelihood of a stroke. The lesion is likely located in the right internal capsule, which is a common site for strokes.

Option A (right frontal lobe) is incorrect because the patient's symptoms do not indicate a lesion in this area. Right frontal lobe lesions would typically cause symptoms such as difficulty with movement and changes in personality or behavior.

Option B (left frontal lobe) is also incorrect for similar reasons. Lesions in the left frontal lobe would typically cause symptoms such as difficulty with speech and language, rather than the motor symptoms seen in this patient.

Option D (left internal capsule) is incorrect because the patient's symptoms are all on the right side of the body, indicating a lesion on the opposite side (i.e., the right internal capsule).

Option E (left parietal lobe) is also incorrect because the patient's symptoms do not suggest a lesion in this area. Lesions in the left parietal lobe would typically cause symptoms such as difficulty with sensation and spatial awareness, which are not present in this patient.