What is the speed of operation in Pi 3?

900mhz
1.2ghz
1ghz
500mhz

The correct answer is B. The Raspberry Pi 3 Model B+ has a 1.2 GHz 64-bit quad-core ARM Cortex-A53 processor.

The other options are incorrect. Option A is the speed of the Raspberry Pi 2 Model B. Option C is the speed of the Raspberry Pi Model B. Option D is the speed of the Raspberry Pi Model A+.