Match the given elements with their atomic numbers: 

I-d; II-c; III-a; IV-b

The correct answer is option 2. I-d; II-c; III-a; IV-b.

Let us go through each element and its corresponding atomic number:

I. Sodium (Na) - Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is commonly found in compounds such as sodium chloride (table salt) and sodium hydroxide. Its atomic number, 11, represents the number of protons found in the nucleus of a sodium atom.

II. Chlorine (Cl) - Chlorine is a chemical element with the symbol Cl and atomic number 17. It is a yellow-green gas at room temperature and is a member of the halogen group. Chlorine is widely used for disinfection, bleaching, and in the production of various chemicals. Its atomic number, 17, indicates that a chlorine atom has 17 protons in its nucleus.

III. Neon (Ne) - Neon is a chemical element with the symbol Ne and atomic number 10. It is a colorless, odorless, inert noble gas. Neon is commonly used in neon signs and lighting. Its atomic number, 10, signifies that a neon atom contains 10 protons in its nucleus.

IV. Sulphur (S) - Sulphur, also spelled as sulfur, is a chemical element with the symbol S and atomic number 16. It is a non-metal and occurs naturally as a yellow crystalline solid. Sulphur is an essential element for life and is found in various compounds such as sulfides and sulfates. Its atomic number, 16, indicates that a sulphur atom contains 16 protons in its nucleus.

In summary, the atomic numbers provided match the corresponding elements as follows:

Sodium (Na) - Atomic number: 11

Chlorine (Cl) - Atomic number: 17

Neon (Ne) - Atomic number: 10

Sulphur (S) - Atomic number: 16