The preferred sites of protonation in the following compounds are
`(I) Ph-CH_(2)-overset(1)overset(NH)overset(||)C-overset(2)overset(NH_(2))" "(II)Ph-CH_(2)-overset(3)overset(O)overset(||)C-overset(4)(N)H_(2)`
A. 1 and 3
B. 2 and 4
C. 1 and 4
D. 2 and 3
