Correct answer: (A) St.Mark’s Basilica, Venice; (D) Hagia Irene, Istanbul
Explanation
The official final key accepts A, D: St.Mark’s Basilica and Hagia Irene are Byzantine examples of domes carried on pendentives. Dilwara uses a different corbelled temple-building tradition. Source-key caveat: the original historical construction account of Westminster Cathedral also describes dome pendentives, so excluding B should not be taken as proof that its structure has none. Preserve the official A, D grading while distinguishing that architectural inconsistency.
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