Solution:The pattern followed here is :(1st number) × 5 = (2nd number) & (2nd number) × 5 = (3rd number)
(10, 50, 250) → 10 × 5 = 50 & 50 × 5 = 250
(20, 100, 500) → 20 × 5 = 100 & 100 × 5 = 500
Similarly,
(8, 40, 200) → 8 × 5 = 40 & 40 × 5 = 200
Hence, "(8, 40, 200)" is the correct answer.