Which of the following feature is used to identify a male cockroach from a female cockroach?

There are various features that are used to differentiate a male cockroach from a female cockroach. These are:(i) The body of male cockroach is smaller than a female cockroach (ii) The abdomen of male cockroach is slender (iii) The wings of male cockroach are larger than that of the females (iv) The antennae of male cockroach are smaller than that of the females (v) Presence of small, unjointed anal styles on the 9th sternum of the abdomen (vi) Presence of long, palp-like jointed anal cerci on the 10th tergum of the abdomen. Thus, the correct answer is option D.