You want traffic to avoid the flow daemon for administrative tasks. In this scenario, the two stateless services that are available with selective stateless packet-based services are:
A) Layer 2 switching. Layer 2 switching is a stateless service that forwards packets based on the MAC addresses of the source and destination hosts. Layer 2 switching does not require any routing or flow processing, and can be performed by the Packet Forwarding Engine (PFE) of the SRX Series device.
You can use selective stateless packet-based services to enable Layer 2 switching for traffic that matches a stateless firewall filter. The firewall filter must have the packet-mode action modifier to bypass the flow daemon1.
B) IPv4 routing. IPv4 routing is a stateless service that forwards packets based on the IP addresses of the source and destination hosts. IPv4 routing does not require any flow processing, and can be performed by the PFE of the SRX Series device. You can use selective stateless packet-based services to enable IPv4 routing for traffic that matches a stateless firewall filter. The firewall filter must have the packet-mode action modifier to bypass the flow daemon1.
The other options are incorrect because:
C) IPsec. IPsec is a stateful service that provides security and encryption for IP packets. IPsec requires flow processing, and cannot be performed by the PFE of the SRX Series device. You cannot use selective stateless packet-based services to enable IPsec for traffic that matches a stateless firewall filter. The firewall filter cannot have the packet-mode action modifier to bypass the flow daemon2.
D) IPv6 routing. IPv6 routing is a stateful service that forwards packets based on the IP addresses of the source and destination hosts. IPv6 routing requires flow processing, and cannot be performed by the PFE of the SRX Series device. You cannot use selective stateless packet-based services to enable IPv6 routing for traffic that matches a stateless firewall filter. The firewall filter cannot have the packet-mode action modifier to bypass the flow daemon3.
Reference: Selective Stateless Packet-Based Services Overview IPsec VPN Overview IPv6 Overview