The inert gas is delivered to the cargo tanks by an inert gas deck main line. Find the correct labelling for the deck equipment items,

A. 1-Pressure/Vacuum Valve; 2- Cargo tank valves; 3- Mast Riser; 4-Isolating Valve
B. 1-Mast Riser; 2-Isolating Valve; 3-Cargo tank valves ; 4- Pressure/Vacuum Valve
C. 1-Cargo tank valves; 2- Pressure/Vacuum Valve; 3- Mast Riser; 4-Isolating Valve
D. 1-Isolating Valve; 2- Pressure/Vacuum Valve; 3- Mast Riser; 4-Cargo tank valves