Answer: Option (B) is the correct answer.
Step-by-step explanation:
When two objects with different temperatures are placed adjacent to each other then heat flows from hotter to colder object.
For example, when a pot of boiling water is dumped into a tub of cold water then heat flows from hot water to cold water.
Thus, we can conclude that out of the given options, the option heat flows from the hot water to the cold water is the correct option.