[amp_mcq option1=”30″ option2=”28″ option3=”27″ option4=”17″ correct=”option1″]
The correct answer is $\boxed{\text{B}}$.
The series is $1, 2, 5, 10, 17, 28$. The next number in the series is found by adding the previous two numbers. For example, $17 + 28 = 45$. Therefore, the missing number is $\boxed{28}$.
Option A, $30$, is incorrect because it is not the sum of the previous two numbers.
Option C, $27$, is incorrect because it is not the sum of the previous two numbers.
Option D, $17$, is incorrect because it is already in the series.