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1. $C a {(O H)}_{2}$

A. $[C a^{2 +}] {[O H^{-}]}^{2}$
B. $[C a^{2 +}] {[O H^{-}]}^{2}$
C. $[C a^{2 +}] {[O H^{-}]}^{2}$
D. $[C a^{2 +}] {[O H^{-}]}^{2}$

Answer: Option A

Explanation:

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