Identify the correct statement.

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(D) In grasshoppers,the sex determination mechanism is of the $XO$ type. Females have two $X$ chromosomes $(XX)$ and are homogametic,while males have

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All of the given statements are correct.

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(D) In grasshoppers,the sex determination mechanism is of the $XO$ type. Females have two $X$ chromosomes $(XX)$ and are homogametic,while males have only one $X$ chromosome $(XO)$ and are heterogametic. This makes option $A$ correct.In Drosophila,sex is determined by the ratio of $X$ chromosomes to autosomes,not by the fourth pair of chromosomes (which are dot-like autosomes). This makes option $B$ incorrect.In squash bugs (Anasa tristis),the sex determination mechanism is also of the $XO$ type,where males are $(XO)$ and females are $(XX)$. This makes option $C$ correct.Since both $A$ and $C$ are correct,the most appropriate answer is $D$.

Column $I$	Column $II$
$(a) XX-XO$ method of sex determination	$(i)$ Turner's syndrome
$(b) XX-XY$ method of sex determination	$(ii)$ Female heterogametic
$(c)$ Karyotype $45$	$(iii)$ Grasshopper
$(d) ZW-ZZ$ method of sex determination	$(iv)$ Female homogametic

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Identify the wrong statement.

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