Each equation below contains a statement followed by Quantity I and Quantity II. You have to study the information along with question and compare the...

Each equation below contains a statement followed by Quantity I and Quantity II. You have to study the information along with question and compare the value derived from Quantity I and Quantity II, give the answer.
Quantity I: A boat covers a distance of $20 ext{ km}$ downstream in $4$ hours and the same distance upstream in $5$ hours. Find the speed of the boat in still water (in km/hr).

Quantity II: A boat can travel $48 ext{ km}$ in $3$ hours in still water. If the speed of the stream is $4 ext{ km/hr}$, find the difference between the time taken by the boat to cover $48 ext{ km}$ upstream and the time taken in still water.

Compare Quantity I and Quantity II and choose the correct option: