A \( \text{CaO.Al}_2\text{O}_3 \)
B \( \text{Al}_2\text{O}_3.\text{Fe}_2\text{O}_3 \)
C \( \text{CaSO}_4.\text{2H}_2\text{O} \)
D \( \text{3CaO.SiO}_2 \)
E \( \text{SiO}_2 \)
Correct Answer: Option C
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