What will come in place of the question mark (?) in the given series?

8, 17, 35, 71, ?, 287​​

8, 17, 35, 71, ?, 287​​

Logic: “2 times + 1”

Starting with 8:

8 × 2 + 1 = 17 

17 × 2 + 1 = 35 

35 × 2 + 1 = 71 

71 × 2 + 1 = 143 

143 × 2 + 1 = 287 

So the missing number is: 143

​Thus, correct option is (b).