Which of the following is an example of sequential code?

The correct answer is Option (1) → Using code "CL001" for "Accounts of XYZ Ltd"

A sequential code gives numbers or letters in consecutive order, one after another (CL001, CL002, CL003 ...), so a missing number shows at once.

Why the other options are incorrect

• Option (2) Using code "100-199" for "Dealers of small pumps" — Incorrect. A range of numbers set apart for one group is a block code.

• Option (3) Using code "SJ" for "Sales Journals" — Incorrect. Letters that recall the name are a mnemonic code.

• Option (4) Using code "HQ" for "Headquarters" — Incorrect. This too is a mnemonic code, an abbreviation of the name.