Correct option is B
given series: 451, 472, 493, 514, ?, 556
Logic: Difference between alternate number is 21.
From 451 to 472, the difference is
472−451=21.
From 472 to 493, the difference is
493−472=21.
From 493 to 514, the difference is
514−493=21.
So, the pattern so far involves adding 21 to each number.
Continuing the pattern, we add 21 to 514:
514+21=535
Therefore, the missing number should be 535.
Correct answer is 535.