Consider the following code snippet:JavaHttpRequest req = new HttpRequest();req.

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The provided code uses hard-coded strings for the URL and authe8ntication headers, which is a security risk and makes maintenance difficult. To add flexibility and security, Salesforce provides Named Credentials (Option D). A Named Credential acts as a single definition that encapsulates both the endpoint URL and the required authentication (Basic, OAuth, etc.) in a single Setup record.

By using the callout: protocol in the setEndpoint method (Option B), the developer instructs the Apex runtime to look up the configuration stored in the Named Credential named endPoint_NC. This approach provides several key benefits:

Security: Credentials like passwords are encrypted and stored safely in the platform's metadata, not in the code.

Simplified Code: The logic for building the Authorization header and base64 encoding (as seen in the original snippet) is handled automatically by the platform.

Maintainability: If the endpoint URL or the password changes, an administrator can update the Named Credential record via the UI without requiring any code deployment.

Custom Labels (Option A and C) can store URLs, but they cannot securely handle authentication logic or headers. Therefore, the combination of a Named Credential and the callout: syntax is the optimal platform-native solution for flexible and secure integrations.