Direction: In the given question a sentence is divided into four parts out of which the first part is correct. The remaining parts may/may not be erroneous. Choose the part/parts that is/are erroneous. If all the remaining three parts are correct, mark option 5 i.e. All are correct as the answer.

In a somewhat similar way, a (A) dark linear interruption on a bright (B) ground may be visible, although it's actual (C) width is much inferior than the half wave-length. (D)