Most common site for impaction of gell stones in gall stone lieus is :
Answer is C (Terminal ileum):'Classically there is obstruction / impaction about 60 cm proximal to ileocaecal valve'- Bailey'The site of obstruction by the impacted gall stone is usually at the ileocaecal valve" provided that the more proximal S.I. is of normal calibre. - HarrisonsIf both choices come simultaneously in a question go for 60 cm proximal to ileacoecal valve, as, it has been defined as the narrowest pa of small intestine.
Ist pa of duodenum
IInd pa of duodenum
Terminal ileum
Colon