This is Simplified form:
$f=AB+BC+CA$
Actual form:
$f=ABC'+A'BC+AB'C+ABC....................(1)$
Two select lines:
$A\ and\ B$
Let Inputs be:
$I_{0},I_{1},I_{2},I_{3}$
$f=A'B'I_{0}+A'BI_{1}+AB'I_{2}+ABI_{3}....................(2)$
Compare $(1)$ and $(2)$
$I_{0}=0$
$I_{1}=C$
$I_{2}=C$
$I_{3}=1$