Match List I (Components) with list II (Functions) and select the correct answer using the codes given below the Lists:

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List I A. Steam trap B. Fusible plug C. Blow-off cock D. Feed check valve List II 1. Controls steam flow rate 2. Controls rate of water flow to boiler 3. Puts off furnace fire when water level reaches unsafe limit 4. Removes mud and dirt collected at the bottom of boiler 5. Drains off water collected by partial condensation of steam in pipes