Which of the following statement is incorrect?

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Here statement in option D is incorrect as Chlorophyll is complex of Mg and not of calcium.
A. Alkali metal solution in ammonia is strongly reducing, due to the presence of solvated electrons. Metal ammonia solution also liberate $H_{2}$ on standing.
B. Anhydrous beryllium chloride is polymeric in solid state, but $B e C l_{2}$ vapour contains $B e C l_{2}$ and $(B e C l_{2})_{2}$ . This compound exhibit three-centre bonding.

C. $C a C_{2} + 2 H O H \to C H \equiv C H + C a (O H)_{2}$

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