Triple

Target entity: first London equation
Context triple: [London theory of superconductivity, mathematicalFormulation, first London equation]

• A. London equations chosen
  The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
• B. Ginzburg–Landau theory of superconductivity
  The Ginzburg–Landau theory of superconductivity is a phenomenological framework that describes superconductors using a complex order parameter and macroscopic equations to capture phase transitions, coherence length, and magnetic behavior.
• C. London theory of superconductivity
  The London theory of superconductivity is a foundational phenomenological model that explains key electromagnetic properties of superconductors, such as perfect diamagnetism and the Meissner effect, through the London equations.
• D. BCS theory of superconductivity
  The BCS theory of superconductivity is a fundamental microscopic theory that explains superconductivity through the formation of Cooper pairs of electrons and their collective quantum behavior in a solid.
• E. Bardeen–Stephen model of flux flow in superconductors
  The Bardeen–Stephen model of flux flow in superconductors is a theoretical framework that describes how magnetic vortices move and dissipate energy in type-II superconductors under applied currents and fields.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.