Zone of maximum ice-crystal formation is in the temperature range of:

Correct option is C

Correct Answer: (c) −1 to −5 °C
Explanation:
→ The critical zone for ice-crystal formation is −1 to −5 °C where water converts to ice slowly, forming large crystals.
→ Foods must pass this zone quickly to avoid tissue damage.
Information Booster:
→ Rapid freezing minimizes time in this zone, producing superior texture.
Additional Information (Other Options):
(a), (b), (d): Only partial or narrower ranges, not the full ice-crystal maximum zone.