A 21 year old man with nausea, vomiting and jaundice has the…

A 21 year old man with nausea, vomiting and jaundice has the following laboratory findings: Total serum bilirubin               8.5 mg/dl (0 – 0.1 mg/dl) Conjugated serum bilirubin      6.1 mg/dl (0 – 0.5 mg/dl) Urine urobilinogen                  increased Fecal urobilinogen                  decreased Urine bilirubin                        positive (negative) AST                                      300 U/L (0 – 50 U/L) ALP                                      900 U/L (0 – 150 U/L) These results can best be explained as representing:  (14.15)