A 20-Year-Old Man Is Admitted to the Ward Due to a High

A 20-year-old man is admitted to the ward due to a high fever, headache, and lethargy for the last week. The patient complains of nausea and multiple times of vomiting. Her temperature is 39.2 C (102.56 F) , blood pressure is 120/80 mm Hg, and pulse is 120/min. Physical examination shows that the patient is not alert, has excessive sweating, and has a rash spread on the trunk. He has positive signs of meningeal irritation. Radiological imaging excludes any space-occupying lesions. He is sent for a lumbar puncture for cerebrospinal fluid collection. Which of the following anatomical landmarks would help in localizing the proper location of lumbar puncture?

A) Anterior superior iliac spine
B) Costal margin
C) Iliac crest
D) Inferior angle of the scapula
E) Posterior superior iliac spine