See the electric circuit shown in the figure.Which of the

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See the electric circuit shown in the figure.

Which of the following equations is a correct equation for it?

1. ε₂ – i₂ r₂ – ε₁ – i₁ r₁ = 0
2. − ε₂ – (i₁ + i₂) R+ i₂ r₂ = 0
3. ε₁ – (i₁ + i₂) R + i₁ r₁ = 0
4. ε₁ – (i₁ + i₂) R– i₁ r₁ = 0

Correct Option: D

Applying Kirchhoff ’s rule in loop abcfa
ε₁ – (i₁ + i₂) R – i₁ r₁ = 0.