Correct Answer & Explanation
Option B
• The series follows an alternating arithmetic-multiplication rule: multiply by 2 and alternately add 1 or subtract 1.
2 × 2 + 1 = 5
5 × 2 - 1 = 9
9 × 2 + 1 = 19
19 × 2 - 1 = 37
Missing term = 37 × 2 + 1 = 75