Four words have been given, out of which three are alike in some manner and one is different. Select the odd one.

Let's analyzed all the options:

(a) Pedestal – A base or support for a statue, column, or object.
(b) Road – A path for vehicles and pedestrians, used for transportation.
(c) Highway – A major road connecting cities, designed for fast travel.
(d) Street – A small road found in cities and towns, used for vehicles and pedestrians.
Road, Highway, and Street are all types of pathways used for transportation.

Pedestal  is unrelated to transportation; it is a structure that supports objects like statues.

​Odd one out:​
Pedestal  is different because it is not related to roads or transportation.
Thus, the correct option is (a) Pedestal