I think the correct answer in this one is B. Fallback host F. Priority group activation because of the following documentation https://devcentral.f5.com/s/articles/controlling-a-pool-members-ratio-and-priority-group-with-icontrol https://support.f5.com/csp/article/K6510

B for maintenance and F for HA

B Fallback host Another feature that you can configure within an HTTP profile is HTTP redirection. HTTP redirection allows you to redirect HTTP traffic to another protocol identifier, host name, port number, or URI path. Redirection to a fallback host occurs if all members of the targeted pool are unavailable, or if a selected pool member is unavailable. (The term unavailable refers to a member being disabled, marked as down, or having exceeded its connection limit.) When one or more pool members are unavailable, Local Traffic Manager™ can redirect the HTTP request to the fallback host, with the HTTP reply Status Code 302 Found.

Guys am not sure where to post this on here so everyone intending to sit for this exam can see. These dumps are completely useless. Just failed the exam today, this is coming from a CCNP certified engineer with conservatively 8 years networking experience. The exam is not hard but you just need to cover the right material which I obviously didn't do and you'll be good! I thought I'd save some people money. Makes no difference to me as contractor, I'll just resit it in 2 weeks and get it claimed as an expense but might not be the case for some paying from their pockets. Hope this helps someone!