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Which process causes detachment of 'pietra dura' inlay in Mughal-era monuments facing high dew points?

A)Capillary condensation exceeds adhesive strength
B)Thermal expansion mismatches induce shear
C)Salt efflorescence pulverizes stone material
D)Biogenic weathering weakens mortar joints

💡 Explanation

Capillary condensation weakens the adhesive bond because water molecules accumulate causing interfacial stress. Thus, detachment occurs when capillary forces overcome adhesive molecular forces, rather than thermal stress, material decay, or biological processes weakening it under those conditions.

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