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When Mughal-era pietra dura inlay weathers, which degradation outcome occurs because soluble salts migrate outward?

A)Surface crusting and material loss
B)Internal micro-fracture propagation rate
C)Polishing compound refractive index changes
D)Inlay adhesive bond-line crystallization

💡 Explanation

Surface crusting and material loss results from efflorescence, wherein water carries salts to the surface; capillary action causes salt crystals accumulate because they exert pressure, therefore causing material spallation rather than internal fractures or adhesive changes.

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