for NSX-T 3.0 , the answer is correct http://www.vmwarearena.com/create-nsx-t-edge-cluster-vmware-nsx-t-part-18/

NSX-T 2.4.0 -> 10 Edge Nodes Per Cluster https://configmax.vmware.com/guest?vmwareproduct=NSX-T%20Data%20Center&release=NSX-T%20Data%20Center%202.4.0&categories=17-0

I spend nearly 1 hour to look for correct answer that already provide in here in first place. Reference guide: https://nsx.techzone.vmware.com/resource/vmware-nsx-t-design-guide-designing-environments-nsx-t#sec4-sub3 Please read on: 4.3.3 Edge Cluster it said: An Edge cluster is a group of homogeneous Edge transport nodes – all VM or all bare metal Not enough? - Edge VM and bare metal Edge cannot coexist in the same cluster. Edge VMs of different sizes can be combined in the same cluster; however, it is not recommended. For D: A maximum of 8 Edge nodes can be grouped in an Edge cluster. A tier-0 LR supports a maximum of eight equal cost paths, thus a maximum of eight Edge nodes are supported for ECMP

"Edge VM and bare metal Edge cannot coexist in the same cluster" ref:https://nsx.techzone.vmware.com/resource/vmware-nsx-t-design-guide-designing-environments-nsx-t#sec4-sub3 hence, AD

https://docs.pivotal.io/pks/1-6/nsxt-install-edge-node-install.html#:~:text=The%20Edge%20Node%20VM%20can,2%3B%20the%20maximum%20is%2010. A&D

Answer is A&D.... 10 edge nodes allowed per cluster https://configmax.vmware.com/guest?vmwareproduct=VMware%20NSX-T&release=NSX-T%20Data%20Center%202.4.2&categories=17-30,17-31,16-0,18-46,18-32,18-33,20-0

A & E is the correct answer. See the link & note from vmware techzone below: https://nsx.techzone.vmware.com/resource/vmware-nsx-t-design-guide-designing-environments-nsx-t#sec4-sub3 There can be only one tier-0 LR per Edge node; however, multiple tier-1 LRs can be hosted on one Edge node. Edge VM and bare metal Edge cannot coexist in the same cluster. Edge VMs of different sizes can be combined in the same cluster; however, it is not recommended. A maximum of 8 Edge nodes can be grouped in an Edge cluster. A tier-0 LR supports a maximum of eight equal cost paths, thus a maximum of eight Edge nodes are supported for ECMP. Edge nodes in an Edge cluster run Bidirectional Forwarding Detection (BFD) on both tunnel and management networks to detect Edge node failure.

looks AD is correct https://nsx.techzone.vmware.com/resource/vmware-nsx-t-design-guide-designing-environments-nsx-t

It seems answer AD is correct. all Edge nodes must be the same type – either bare metal or VM.

BD is correct

Answer is BD