●    Boiler mounting are the devices which are necessary for the safe and satisfactory operation of the boiler.

●    These devices are mounted over the shell or drum of the boiler. Some important boiler mounting are :

(i) Pressure gauge

(ii) Water level indicator

(iii) Safety valve

(iv) Steam stop or junction valve

(v) Blow sown valve or blow off cock

(vi) Feed check valve

(vii) Fusible plug

Devices that are installed with boilers to increase its efficiency is known as boiler accessories.

Some important accessories are :

(i) Feed water pump

(ii) Injector

(iii) Economizer

(iv) Super-heater

(v) Air pre-heater

Hence, the correct option is (A).