Integers are whole numbers. They have no fractional part. The difference is that integers include negative numbers while whole numbers count from 0 upwards. It means that whole numbers are positive
Therefore,
a. 6 is a whole number and also an integer
b. - 208 is an integer
c. 0 is a whole number and an integer
d. 10/11 is neither a whole number nor an integer
f. -1 is an integer
g. 15.01 is neither a whole number nor an integer
h. 53 is an integer and a whole number
i. 9/19 is neither a whole number nor an integer
j. 91 is an integer and a whole number