With reference to the cultural history of India, consider the following statements : 1. White marble was used in making Buland Darwaza and Khankah at Fatehpur Sikri. 2. Red sandstone and marble were used in making Bara Imambara and Rumi Darwaza at Lucknow. Which of the statements given above is/are correct ?

Option (d) is correct because both statements are factually inaccurate: the Buland Darwaza is primarily constructed of red and buff sandstone (with marble used only for inlay), while the Bara Imambara and Rumi Darwaza in Lucknow were built using bricks and lime plaster (stucco) rather than stone. Statement 1 is the most tempting error because white marble is famously used in the nearby Tomb of Sheikh Salim Chishti, but it is not the primary material for the Buland Darwaza. The core concept being tested is the distinction between the material-heavy Mughal architecture of the 16th century and the brick-and-stucco regional style of the Nawabs of Awadh in the 18th century.