Which company is NOT part of the trio investing to build a quantum computer?

• A. IBM
• B. Amazon
• C. Microsoft
• D. Google

Answer: (B)

The idea being tested is which big players are actively pursuing the hardware side of quantum computing as a focused group. IBM, Google, and Microsoft are widely viewed as the trio deeply invested in building and scaling a quantum computer, each pushing hardware development in different directions: IBM with accessible superconducting qubits and a strong software ecosystem (Qiskit); Google achieving a milestone in quantum supremacy with their quantum processor; and Microsoft pursuing alternative approaches like topological qubits and a broad platform for developers through Azure Quantum. Amazon, while heavily involved in quantum tech, mainly operates as a service provider that lets users access various quantum devices via AWS Braket, rather than leading a unified, internal hardware effort to build a quantum computer itself. So Amazon isn’t part of that core trio driving hardware development, making it the correct answer.