Discussion

Explanation:

Let us calculate the difference between consecutive terms.

97 – 19 = 78 = 6 × 13

162 – 97 = 65 = 5 × 13

214 – 162 = 52 = 4 × 13

253 – 214 = 39 = 3 × 13

∴ ? – 253 = 2 × 13 = 26

⇒ ? = 253 + 26 = 279

Hence, option (b).

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