For a knapsack problem, $P$ and $W$ are profits and weights for a set of $7$ items as given below:

$P={9,5,2,7,6,16,9}$

$W={2,5,6,11,1,9,3}$

Which of the following statements is correct for a knapsack?

In $0/1$ knapsack, an item is either selected completely or rejected completely.

In fractional knapsack, an item can be divided into smaller parts according to required weight.

So, correct option is:

$\boxed{(d)\ \text{In }0/1\text{ knapsack problem, items cannot be divided into smaller portions and in fractional knapsack we can divide the item into required proportions of weight}}$