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Anup Padwal Best Answer
A: correct B: wrong because Option A correct. C: wrong because it is trimer. it is gormed of three identical proteins. D: correct it is a glycoprotein in short Influenza hemagglutinin or haemagglutinin is a homotrimeric glycoprotein found on the surface of influenza viruses and attached to sialic acid residue of host Plasmamemrane.