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← HistoryWhich risk increases for Mughal-era pietra dura inlay exposed outdoors at increasing altitude?
A)Efflorescence deposit formation increases
B)Base marble fracturing resistance decreases
C)Differential thermal expansion amplified✓
D)Polishing binder oxidation accelerates severely
💡 Explanation
Increased altitude entails larger temperature gradients, therefore greater differential thermal expansion occurs between the inlay and the base stone; because disparate materials expand at varying rates there’s more interfacial stress, rather than simple oxidation or deposits.
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