Step 1: Understanding the Concept:
Ice cream contains water in frozen and unfrozen forms.
The percentage of ice formation depends on temperature.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the ice formation in ice cream.
Step 3: Detailed Explanation:
When ice cream is extruded at -5° to -6°C,
about 45-55% of the water is frozen into ice.
The remaining water is in the unfrozen state.
This provides the desired texture.
Thus, 45-55% is the correct range.
Step 4: Final Answer:
The percentage of water formed into ice is 45-55%.
Hence, the correct option is (B).