Essential Part - Verbal and Reasoning

Directions to SolveEach question has an underlined word followed by four answer choices. You will choose the word that is a necessary part of the underlined word.
Q1:

desert

A cactus

B arid

C oasis

D flat

ANS:B - arid

Explanation: A desert is an arid tract of land. Not all deserts are flat (choice d). Not all deserts have cacti or oases (choices a and c).