The cause of mechanical icterus can be evaluated by:
1) Intravenous cholangiography
2) Retrograde cholangiography
3) Scintigraphy
4) Percutane transhepatic cholangiography
5) Peroral cholecystography
A. 2., 4.
B. 1., 2., 4., 5.
C. 1., 3., 5.
D. 1., 2., 3.
E. All answers are right
Answer: A. 2., 4.