Select the correct option that will fill in the blank and complete the series.-1, 2, 7, ?, 23, 34

Let's find the difference between consecutive terms in the series:$2-(-1)=3$$7-2=5$ The differences are increasing consecutive odd numbers ($3,5,7,9,11,\dots$).Following this pattern:Next difference should be $7$:
$$7+7=14$$
Let's verify with the remaining terms:
$$14+9=23$$
$$23+11=34$$
The pattern holds perfectly. The missing number is 14.