The correct answer is B because the Time Machine feature of NDB collects logs and snapshots from databases and stores them in a distributed file system. The Time Machine enables the administrator to protect, clone, and restore databases using the SLA policies and the NDB UI or API. The Time Machine also manages the replication of database snapshots in an NDB multicluster environment. The other options are not correct because they describe different features or functions of NDB. Option A is not correct because Database Restore is an operation that uses the Time Machine to restore a source database or a clone to a previous point in time. Option C is not correct because SLA is a policy that defines the frequency and retention of database snapshots and logs. Option D is not correct because One-click Patching is a feature that allows the administrator to test, publish, and apply database patches using the NDB UI or API.
Reference: Nutanix Database Management & Automation (NDMA) course, Nutanix Certified Professional
- Database Automation (NCP-DB) certification, Nutanix NCP-DB Certification Exam Syllabus and Study Guide, Nutanix Support & Insights