Select the option that can be used as a one-word substitute for the given group of words.
A piece of land entirely surrounded by water

Correct option is C

The correct one-word for the given group of words is (c) Island.
Island: A piece of land completely surrounded by water. (Hindi: द्वीप)
Example: The Andaman and Nicobar is a group of islands.
Meanings of the other options:
· (a) Igloo – A type of dome-shaped snow house (बर्फ का घर)
· (b) Harbour – A place for ships to dock (बंदरगाह)
· (d) Oasis – A fertile area in a desert (मरुस्थल में हरा-भरा स्थान)