Select the two correct statements out of the four $(i -iv)$ statements given below about lac operon.

$(i)$ Glucose or galactose may bind with the repressor and inactivate it.

$(ii)$ In the absence of lactose the repressor binds with the operator region.

$(iii)$ The z­gene codes for permease.

$(iv)$ This was elucidated by Francois Jacob and Jacques Monod.

The correct statements are

• A

  $(ii)$ and $(iii)$

• B

  $(i)$ and $(iii)$

• C

  $(ii)$ and $(iv)$

• D

  $(i)$ and $(ii).$