Option a is the correct answer. Adina Masjid is located in Malda, not Mandu. The Adina Mosque in Malda District, India, built during the Bengal Sultanate, is the largest structure of its kind in the Indian subcontinent. Commissioned in 1373 by Sikandar Shah, it features vast hypostyle architecture reminiscent of the Umayyad Mosque and reused materials from pre-Islamic structures. The other options are correctly matched. Important Tips The Lal Darwaza Mosque, also known as the Red Portal Mosque or Ruby Gate Mosque, is an architectural marvel in Jaunpur. Queen Rajye Bibi commissioned its construction in 1447 to honor the revered saint Sayyid Ali Dawood Kutubbudin. This grand mosque stands as a testament to the historical and cultural significance of the region. The Dakhil Darwaza, constructed in 1425, stands as the largest structure in Sultanate of Bengal. It served as the primary entrance to the citadel of Gaur. Its construction is attributed to Alauddin Husain Shah, featuring impressive architectural elements with minimal terracotta ornamentation, making it a majestic and significant monument in Gaur-Lakhnauti. Teen Darwaza, a historical gateway in Ahmedabad, India, completed in 1415 by Sultan Ahmed Shah, who founded the city of Ahmedabad, served as an egress from Bhadra Fort. It features three arches, decorated buttresses, and a terrace. Associated with significant events, it was used for assembling troops and court proceedings.