The sum of the smallest whole number and greatest negative integer is____
A. $0$
B. $ - 1$
C. $1$
D. $2$

Hint:Whole number starts with $0,1,2,3,4,.....$
             Negative integers $.................., - 4, - 3, - 2, - 1$

Complete step by step solution:
Given condition is to add smallest whole number and greatest negative integer
We know that, smallest whole number is $0$
                        Largest negative integer is $( - 1)$
Adding,
Smallest whole number with greatest negative integer
We get,
$ - 1 + 0 = - 1$
$( - 1)$ is the required answer.

Hence, the option B is the correct.

Additional Information: The set of the real numbers is made by combining the set of all the rational numbers and all the set of irrational numbers. The real numbers include natural numbers, whole numbers, integers, rational numbers including all the fractions, decimals and repeating numbers and irrational numbers.

Note: Always remember the different concepts of whole numbers, natural numbers, and integers