Explanation:

- The legal recognition of digital signatures is covered under Section 3 of the Information Technology Act, 2000.

- Section 3: Deals specifically with the authentication of electronic records using digital signatures.

- Section 5: Pertains to the legal recognition of electronic records, not specifically digital signatures.

- Section 4: Talks about the legal recognition of electronic records in general.

- Section 6: Deals with the use of electronic records and digital signatures in government and its agencies.

Correct Answer: Option 1 - Section 3