Question: What is the reaction involved in Holmes signal?
Options
A : Ca3P2 + 6H2O ? 2PH3 + 3Ca(OH) 2
B : Ca3P2 + 6H2O ? 2PH3 ? P2H4 + P4O6 and CaC2 + H2O ? C2H2
C : Ca3P2 + 6HCl ? 2PH3 + 3CaCl2
D : P4 + 3NaOH + 3H2O ? PH3 + 3NaH2PO2
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