Which one is used in the manufacture of mirror [MP PET 1992]

1.	Which one is used in the manufacture of mirror [MP PET 1992]
A.	Red lead (litharge)
B.	Ammoniacal \[AgN{{O}_{3}}\]
C.	Ammoniacal \[AgN{{O}_{3}}+\] Red lead
D.	Ammoniacal \[AgN{{O}_{3}}+HCHO\]
Answer» E.

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Which one is used in the manufacture of mirror [MP PET 1992]

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