The Malware Protection section of the standard is interested in your organisation’s posture around Anti-virus and sideloading applications.
In the case of A8.1 if your organisation is using mobile devices you should state B as well as part of your answer.
A8.2 and A8.3 - do your devices have antivirus protection? This applies to Linux and Mac devices.
A8.4 and 8.5 are controls around mobile devices and ensuring that they are not jailbroken or rooted and that they can only install application that are approved.