'XO' type of sex determination is found in:

The correct answer is Option (2) → Grasshopper

Option (2) Grasshopper — Correct. In many insects such as the grasshopper, females have XX and males have only one X (XO). All eggs carry an X; half the sperms carry an X and half do not, so the sex depends on the sperm.

NCERT Extract:
Sex Determination – “… Due to the involvement of the X-chromosome in the determination of sex, it was designated to (b) be the sex chromosome, and the rest of the chromosomes were named as autosomes.Grasshopper is an example of XO type of sex determination in which the males have only one X-chromosome besides the autosomes, whereas females have a pair of X-chromosomes.”