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

Let's analyze all the options:

(a) Week – A standard unit of time consisting of 7 days.
(b) Day – A basic unit of time, consisting of 24 hours.
(c) Month – A larger unit of time, typically consisting of 28-31 days.
(d) Season – A period marked by weather changes, but not a fixed unit of time like the others.
Odd One Out:
Week, Day, and Month are all fixed and measurable time units used in calendars.
Season is not a fixed time unit; it varies in length depending on geography and climate.
Thus, the correct option is (d)Season.