In the reaction
HC≡CH+2AgNO3NH4OH−−−−−→X+2NH4NO3+2H2O 'X' is
Ag2C
Ag2C2
AgC
AgOH
HC≡CH+2AgNO3NH4OH−−−−−→Ag−C≡C−Ag+2NH4NO3+2H2O
HC≡CHHgSO4−−−−−−→Dil H2SO4ACH3MgBr−−−−−−→H2OBP+Br2−−−−→C. In this reaction 'C' is