Source: Exemplar

Which among the following is(are) double displacement reaction(s)? (i) Pb + CuCl₂ → PbCl₂ + Cu (ii) Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl (iii) C + O₂ → CO₂ (iv) CH₄ + 2O₂ → CO₂ + 2H₂O

Options

Option A

(i) and (iv)

Option B is correct

(ii) only

Option C

(i) and (ii)

Option D

(iii) and (iv)