Read the sentences properly and select the correct option for mesosome.
$(i)$ Mesosome is an extension of the plasma membrane.
$(ii)$ These extensions are only in the form of spheres.
$(iii)$ Mesosomes help in cell wall formation and $DNA$ replication (not $RNA$ synthesis).
$(iv)$ They help in respiration.

• A
  All four are correct
• B
  $i, ii$ and $iii$ correct
• C
  $i, iii$ and $iv$ correct
• D
  $i, iv$ correct