The correct answer is A. European style.
The Patna High Court building was designed by the British architect Henry Irwin in the Indo-Saracenic style, which is a fusion of Indian and European architectural styles. The building is characterized by its use of domes, arches, and columns, as well as its red sandstone exterior.
The Mughal style is a type of Islamic architecture that was developed in India during the Mughal Empire. It is characterized by its use of domes, arches, and minarets, as well as its intricate tilework and calligraphy.
The Mauryan style is a type of Indian architecture that was developed during the Mauryan Empire. It is characterized by its use of massive stone blocks, as well as its simple and elegant lines.
The Pala style is a type of Indian architecture that was developed during the Pala Empire. It is characterized by its use of brick and terracotta, as well as its intricate carvings and sculptures.