Concept:A prime number has exactly two factors: 1 and itself. A composite number has more than two factors.Explanation:Check each number for primality.103, 107, and 109 are prime numbers. They are divisible only by 1 and themselves.111 is composite because 111=3×37. It has factors 1, 3, 37, and 111.Therefore, 111 does not belong with the others.Answer:Option B (111)