Two batteries of A. The equivalent emf ε_eq of the two cells is between ε₁ and ε₂, i.e. ε₁< ε_eq < ε₂.

B. The equivalent emf ε_eq is smaller than ε₁.

C. The ε_eq is given by ε_eq = ε₁ + ε₂ always.

D. ε_eq is independent of internal resistances r₁ and r₂.

And are in parallel connection.

The equivalent emf will be

The equivalent emf depends on the and . So option D. is wrong.

Equivalent emf is not equal to ε₁ + ε₂. So option C. is wrong.

From the above equation is can’t be smaller than ε₁. So option B. also wrong

So option A. is the correct answer.