Who translated several Sanskrit works, including Patanjali's work on Grammar into Arabic?

Al-Biruni

The correct answer is Option 3: Al-Biruni

Al-Biruni’s expertise in several languages allowed him to compare languages and translate texts. He translated several Sanskrit works, including Patanjali’s work on grammar, into Arabic. For his Brahmana friends, he translated the works of Euclid (a Greek mathematician) into Sanskrit.