CompTIA A+ 220-1101 Practice Question

The AMD Ryzen 5 3600 is the best replacement CPU as it is based on the Zen 2 architecture, which is compatible with the socket typically found on the system's existing motherboard described in the scenario. Other processors listed either do not match the Zen 2 architecture or are designed for other sockets, like FM2+ and TR4 for AMD, or entirely different sockets for Intel processors, thus they are not the suitable replacements within this context.