Option a is the correct answer. The Taj Mahal in Agra beautifully combines elements from Hindu and Persian architecture. Constructed between 1632 and 1648, its symmetry and white marble design were influenced by Hindu color codes and Persian architectural features. Shah Jahan's blend of Persian, Turkish, Indian, and Islamic styles results in a radiant white structure, symbolizing the true dawn, while the use of white and red sandstone connects with both priestly and warrior castes, reflecting Persian and Hindu symbolism.