a. Raphael
Explanation:
The painting was made by one of the great masters of the High Renaissance: Raffaello Sanzio da Urbino, most commonly known as Raphael. It presents a Portrait of Pope Leo X with two cardinals, who are said to be Giulio deβ Medici and Luigi deβ Rossi. The painting, considered by many art critics as a masterful piece of realism, was made between 1518β1519.