UPSC CSE Prelims
Question 1
Among the following organisms, which one does not belong to the class of other three?
View correct answer and explanation
Correct answer: A
Correct Option: A
Explanation: Crabs belong to class Malacostraca of subphylum Crustacea, whereas mites, scorpions and spiders are arachnids. Hence crab is the odd one out.
Option-wise Analysis:
A: Correct - Correct: crab is a crustacean, typically with gills and two pairs of antennae.
B: Incorrect - Mite belongs to Arachnida, unlike crab.
C: Incorrect - Scorpion belongs to Arachnida, unlike crab.
D: Incorrect - Spider belongs to Arachnida, unlike crab.