Concept:The pattern is based on the differences between consecutive terms.Explanation:The given series is 10,17,26,?,50,65.Find the differences: 17−10=7, 26−17=9, 50−?, and 65−50=15.The differences form consecutive odd numbers: 7,9,11,13,15.So, the missing term is 26+11=37.Check: 37+13=50, which matches the next term.Answer:The missing number is 37, so option B is correct.