The first dual-core CPU was the Intel Pentium D.

The answer is False because the first dual-core CPU was not the Intel Pentium D. Before the Pentium D, there were other dual-core processors developed by other companies. For example, Advanced Micro Devices (AMD) introduced the AMD Athlon 64 X2 dual-core processor in 2005, a year before Intel released the Pentium D. Therefore, the Pentium D was not the first dual-core CPU, making the statement false.