What is the correct diagnosis code for Severe combined immunodeficiency (SCID) with normal B-cells?

The order of the small intestinal segments from proximal (oral) to distal (aboral) is:

A) duodenum, ileum, cecum B) duodenum, ilium, jejunum C) duodenum, jejunum, ileum D) duodenum, ilium, colon E) duodenum, jejunum, ilium

Which of the following diagnostic procedures enables the examination of cerebrospinal fluid? 

A. MRI B. lumbar puncture C. cerebral angiography D. electroencephalography