Among (i) $\left[\mathrm{Cr}(\mathrm{en})_{3}\right]^{3+}$, (ii) trans-[ $\left[\mathrm{Cr}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+}$, (iii) Cis-[Cr(en) $\left._{2} \mathrm{Cl}_{2}\right]^{+}$, (iv) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$ the optically active complexes are

• A

  i and ii
• Correct answer
  B

  i and iii
• C

  ii and iii
• D

  ii and iv

Hence, the correct answer is option: 'B'.