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The first statement is incorrect because Buland Darwaza and the Khankah at Fatehpur Sikri, both a part of the historic city built by Mughal Emperor Akbar, were constructed using red sandstone, not white marble.
The second statement is also incorrect. Bara Imambara and Rumi Darwaza at Lucknow were primarily constructed using bricks with limestone as the plaster, with no use of red sandstone or marble. Bara Imambara is known for its unique style of construction without using any metal or wood in the structure.
Option 1 is incorrect as the materials stated are wrong for the mentioned Mughal architecture.
Option 2 is incorrect as the Bara Imambara and Rumi Darwaza in Lucknow did not use red sandstone and marble.
Option 3 is incorrect as both statements are wrong.
Option 4 is correct as neither the first statement nor the second one is accurate.