The correct answer is (b) Arabic.
Ibn Battuta was a Moroccan explorer and scholar who traveled extensively throughout the Muslim world in the 14th century. He wrote a detailed account of his travels, called the Rihla, which is considered one of the most important travelogues ever written. The Rihla is written in Arabic, and it provides a wealth of information about the cultures and societies that Ibn Battuta visited.
Persian is a language spoken in Iran and other parts of Central Asia. Turkish is a language spoken in Turkey and other parts of Central Asia. Uzbek is a language spoken in Uzbekistan and other parts of Central Asia. None of these languages are the language in which Ibn Battuta wrote the Rihla.