Among the following words, which one will come last if they are arranged as per their order in an English dictionary?

Let's compare all the options  alphabetically:

(a) Abode
(b) Aback
(c) Abide
(d) Aboriginal
Aback comes first (starts with "Abac").
Abide comes next (starts with "Abid").
Abode follows (starts with "Abod").
Aboriginal comes last (starts with "Abo", but "Abor" comes after "Abod").
Thus, the correct option is (d) Aboriginal (Comes last in dictionary order).