A blind audit is a type of inventory audit that does not provide any information about the expected assets in a location. The auditor scans all the assets in the location and compares them with the records in ServiceNow1.
To perform a blind audit, you need the Hardware Asset Management (HAM) application, which enables you to manage the lifecycle of your hardware assets, and the ServiceNow Agent mobile app, which allows you to scan asset tags and barcodes using your mobile device12.
The ServiceNow My Assets mobile app is used to view and request assets from the enterprise asset catalog, not to perform audits3.
The Software Asset Management (SAM) application is used to optimize software licenses and compliance, not to perform audits4.
The ITSM Asset Management application is used to track the financial, contractual, and inventory details of hardware and devices, not to perform audits. Reference:
1: Audit your inventory - Product Documentation: San Diego - ServiceNow
2: Enterprise Asset Inventory Management - ServiceNow
3: My Assets mobile app - Product Documentation: San Diego - ServiceNow
4: Software Asset Management - ServiceNow
5: IT Asset Management - ServiceNow

The ServiceNow Mobile Asset App is the app that provides end users visibility to their assigned hardware and consumable assets1.
The Mobile Asset App allows end users to do the following1:
View their assigned assets and consumables in the My Locker screen
Request new assets or consumables from the service catalog
Scan barcodes or QR codes to identify assets
Open incidents related to their assets
Return assets or consumables when they are no longer needed
The other options are not the correct answer because they have different purposes and functionalities2:
B: Mobile App: This is the app that provides end users access to the Now Platform features, such as service catalog, knowledge base, virtual agent, and notifications.
C: Mobile ITAM App: This is the app that provides asset managers and stockroom managers access to the Hardware Asset Management features, such as asset requests, purchase orders, transfer orders, stock order tasks, and asset inventory audit.
D: Mobile Agent App: This is the app that provides IT agents access to the IT Service Management features, such as incidents, problems, changes, requests, and tasks. References:
1: Mobile Asset App
2: ServiceNow Mobile Apps

Explanation
Classes are represented as tables in the ServiceNow database that define the attributes and relationships of a specific type of record1 The base asset class is the alm_asset table, which contains the common fields and properties for all types of assets, such as hardware, software, consumable, etc.2 The alm_asset table is extended by other asset classes, such as alm_hardware, alm_software, alm_consumable, etc., which add more specific fields and properties for each asset type2 The cmdb_asset table is not a class, but a view that joins the alm_asset table and the cmdb_ci table, which is the base configuration item (CI) class3 The cmdb_hardware table is a CI class, not an asset class, that contains the common fields and properties for all types of hardware CIs, such as computers, devices, network equipment, etc.4 References: 1: Tables and Classes - ServiceNow 2: Asset [alm_asset] table - ServiceNow 3: Asset and Configuration Item [cmdb_asset] view - ServiceNow 4: Hardware [cmdb_ci_hardware] class - ServiceNow