Find the missing term in the series given as: 2, 5, 9, 19, 37, ?दी गई श्रृंखला में लुप्त पद ज्ञात कीजिए: 2, 5, 9, 19, 37, ?

1. A74
2. B75
3. C51
4. D61

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Correct answer: B. 75

Explanation

The rule alternates ×2 + 1 and ×2 − 1: 2×2+1 = 5, 5×2−1 = 9, 9×2+1 = 19, 19×2−1 = 37, 37×2+1 = 75. The key shows C (51), which does not fit the pattern.नियम बारी-बारी से ×2 + 1 और ×2 − 1 है: 2×2+1 = 5, 5×2−1 = 9, 9×2+1 = 19, 19×2−1 = 37, 37×2+1 = 75। कुंजी में C (51) दिया है, जो इस क्रम में नहीं बैठता।