
The question asks us to identify the most used building material in the façade of the building shown in the image. The image shows a historical architectural structure, which resembles the Mughal architectural style. Such styles commonly use materials like marble, sandstone, and granite in their construction.
Let’s analyze the options:
The polished and intricate design of the building’s façade seen in the image strongly indicates the use of marble, which was a favored material in significant Mughal architectural works.
Conclusion: The most used building material in the façade of the building shown in the image is Marble.

