Match the following security features with their functionalities.
| Security Feature | Functionality |
| A. Digital Signatures | 1. Restricts access to open or edit a document |
| B. Password Protection | 2. Ensures the authenticity and integrity of the document |
| C. Read-Only Mode | 3. Permanently hides sensitive content in the document |
| D. Redaction | 4. Allows viewing but prevents editing of the document |
Qus निम्नलिखित सुरक्षा सुविधाओं का उनकी कार्यक्षमताओं से मिलान करें।
A. A-2, B-1, C-4, D-3
B. A-3, B-4, C-1, D-2
C. A-4, B-3, C-2, D-1
D. A-1, B-2, C-3, D-4