Two equations are given below:
$A. \oint E \cdot dA = \frac{Q}{\varepsilon_0}$
$B. \oint B \cdot dA = 0$
They are:

  • A
    $A$. Ampere's law,$B$. Gauss law for electricity
  • B
    $A$. Gauss law for electric fields,$B$. Gauss law for magnetic fields
  • C
    $A$. Faraday's law,$B$. Gauss law for electric fields
  • D
    Both $A$ and $B$ represent Faraday's law

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