Concept:Twin primes are pairs of prime numbers that differ by exactly 2. Both numbers must be prime individually.
Explanation:List all prime numbers between 1 and 50: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.
From this list, pick pairs with a difference of 2:
(3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43).
Each pair satisfies the condition. No other pair exists in this range (e.g., (2,3) differ by 1; (47,?) none).
Thus, there are 6 twin prime pairs between 1 and 50.
Answer:B. 6