Concept:Prime numbers have exactly two factors: 1 and itself. Composite numbers have more than two factors.
Explanation:Check each number:
11 – Factors: 1 and 11 only. So it is a prime number.
22 – Factors: 1, 2, 11, 22. So it is composite.
33 – Factors: 1, 3, 11, 33. So it is composite.
44 – Factors: 1, 2, 4, 11, 22, 44. So it is composite.
All numbers except 11 are composite. Hence, 11 is the odd one out.
Answer:Option A. 11