Final answer:
The spleen is located in the left hypochondriac region of the abdominopelvic cavity, near the stomach and left kidney.
Step-by-step explanation:
The spleen is typically located in the left hypochondriac region of the abdominopelvic cavity. This is in the upper left quadrant of the abdomen near the stomach and left kidney. The spleen is a vital organ in the lymphatic system, containing phagocytes and lymphocytes to combat infections. It lies just inferior to the diaphragm and adjacent to the left kidney. Therefore, the correct answer to which abdominopelvic region the spleen is located in is the left hypochondriac region (B).