Explanation

The first person to convert to Islam was generally considered to be Khadijah (a lady), but historically and contextually in many Islamic studies, the first male convert mentioned is often emphasized. Option C, Slave, is likely correct because historical accounts frequently refer to Bilal ibn Rabah as a prominent early convert who was a slave. Option A, Lady, is incorrect because while Khadijah was the first convert, the question might be looking for a different specific figure or context. Option B, Boy, is too general and not the most accurate description of the historical figures. Option D, Companion, is a general title and not the specific status required.