The need of codification is:

The correct answer is Option (3) → The encryption of data

The question is the book’s exercise MCQ 8, and the book’s answer key gives (a) The Encryption of data: a code stands for an account in a coded form (letters or figures with an arbitrary meaning) instead of its plain name.

• Option (1) The generation of mnemonic code — Incorrect. A mnemonic code is one kind of code; generating it is codification itself, not the need for it.

• Option (2) To secure the accounts, reports etc — Incorrect. Security of accounts comes from passwords and access rights, not from codes.

• Option (4) To increase the length of account names — Incorrect. Codes are used for brevity; they shorten, not lengthen, the way accounts are identified.