The need of codification is __________.

The correct answer is Option (1) → Encryption of data

The NCERT answer key for this exercise question gives (a), the encryption of data. A code replaces account names by symbols that have an arbitrary meaning, so the data is kept in a coded form.

Option (1) Encryption of data — Correct. This is the book’s answer: codification turns information into codes.

Option (2) Generation of mnemonic code — Incorrect. Mnemonic codes are one kind of code; making them is codification itself, not the need for it.

Option (3) To secure the accounts, reports, etc. — Incorrect. Security of accounts comes from passwords and access controls, not from codes.

Option (4) To increase the length of account names — Incorrect. Codes do the opposite: they replace long account names by short symbols.