Match the points under Column A with those under Column B.

Column-A	Column-B
i. Hexapoda	a. Daphnia
ii. Crustacea	b. Mosquito
iii. Myriapoda	c. Limulus
iv. Chelicerata	d. Julus

To match the biological groups (subphyla or classes of Phylum Arthropoda) under Column A with their correct representative organisms under Column B, we can analyze the characteristics of each group and identify the corresponding animal:

1. i. Hexapoda: The name "Hexapoda" means "six-legged". This group includes insects, which typically have three pairs of legs. Among the options in Column B, the Mosquito (b) is an insect and belongs to Hexapoda. Thus, i matches with b.

2. ii. Crustacea: This group consists of mostly aquatic arthropods, such as crabs, lobsters, and water fleas, which have two pairs of antennae and biramous appendages. Daphnia (a), commonly known as the water flea, is a well-known planktonic crustacean. Thus, ii matches with a.

3. iii. Myriapoda: The name "Myriapoda" translates to "many legs". This group comprises terrestrial arthropods with elongated bodies and numerous segments, each bearing legs (such as millipedes and centipedes). Julus (d) is a genus of millipedes belonging to Myriapoda. Thus, iii matches with d.

4. iv. Chelicerata: This group includes arthropods that lack antennae and possess chelicerae (claw-like feeding appendages). Examples include spiders, scorpions, and horseshoe crabs. Limulus (c), commonly known as the horseshoe crab, is a classic marine chelicerate. Thus, iv matches with c.

Combining these individual matches gives:
i-b, ii-a, iii-d, iv-c