The correct answer is: A. Muhammad Shah Tughlaq.
Ghiyasuddin Tughlaq was the founder of the Tughlaq dynasty. He ruled from 1320 to 1325. After his death, his son Muhammad Shah Tughlaq became the ruler. Muhammad Shah Tughlaq ruled from 1325 to 1351. He was a powerful and successful ruler. He expanded the Tughlaq empire and built many new cities.
Firuz Shah Tughlaq was the grandson of Ghiyasuddin Tughlaq. He ruled from 1351 to 1388. He was a wise and just ruler. He built many new roads, bridges, and canals. He also promoted education and agriculture.
Nasiruddin Mahmud was the son of Firuz Shah Tughlaq. He ruled from 1390 to 1394. He was a weak and incompetent ruler. He was overthrown by his cousin Timur in 1398.