Consider $6$ memory partitions of sizes $200$ $\text{KB}$, $400$ $\text{KB}$, $600$ $\text{KB}$, $500$ $\text{KB}$, $300$ $\text{KB}$and $250$ $\text{KB}$, where $\text{KB}$refers to $\text{kilobyte}$. These partitions need to be allotted to four processes of sizes $357$ $\text{KB}$, $210$ $\text{KB}$, $468$ $\text{KB}$, $491$ $\text{KB}$in that order. If the best-fit algorithm is used, which partitions are NOT allotted to any process?
- $200$ $\text{KB}$ and $300$ $\text{KB}$
- $200$ $\text{KB}$ and $250$ $\text{KB}$
- $250$ $\text{KB}$ and $300$ $\text{KB}$
- $300$ $\text{KB}$ and $400$ $\text{KB}$