Given multiple virtual networks across two subscriptions tied to different Microsoft Entra tenants, which of the listed VNets can be peered with VNet1?

Azure VNet peering allows you to connect virtual networks. The key requirements for VNet peering are that the VNets must have non-overlapping IP address spaces and be in the same Azure region (for global peering, they can be in different regions). VNet peering supports connections across different subscriptions and even across different Microsoft Entra tenants. Therefore, as long as the IP address spaces do not overlap, VNet1 can be peered with VNet2, VNet3, VNet4, and VNet5, regardless of their subscription or Microsoft Entra tenant affiliation. The options suggesting only a subset of these VNets are incorrect because VNet peering is not restricted by subscription or tenant boundaries.