Step 1: Understanding demat accounts.
- A demat account is used to hold securities in electronic form, eliminating the need for physical certificates.
- Depositories are organizations responsible for providing demat services, ensuring secure and efficient handling of securities.
Step 2: Analyzing the options.
The depository acts as the custodian of securities in electronic form, making it the correct answer.
Conclusion: The correct organization is (A) Depository.