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B
Hemicelulose
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C
Pectin
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D
Peptidoglycan
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Solution
The correct option is D Peptidoglycan
The cell wall of bacteria contains peptidoglycan which is made up of a polysaccharide backbone consisting of alternating N-Acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) residues in equal amounts. It is responsible for rigidity and shape of the bacterial cell wall. So, the correct answer is option D.