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Polymer Matrix Composites (PMCs) and Carbon-Carbon Composites are both subcategories of:
A{'text': 'Ceramic Matrix Composites', 'label': 'B'}
B{'text': 'Hybrid Composites', 'label': 'D'}
C{'text': 'Metal Matrix Composites', 'label': 'A'}
D{'text': 'Organic Matrix Composites', 'label': 'C'}
Answer & Solution
Correct answer: D. {'text': 'Organic Matrix Composites', 'label': 'C'}
OMC encompasses both PMC (polymer matrix, e.g. epoxy + glass fiber) and Carbon-Carbon Composites (carbon matrix + carbon fiber, used in spacecraft heat shields).
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