Which of these is an output of a ‚Äö√Ñ√∂‚àö√ë‚àö‚â§Furnace‚Äö√Ñ√∂‚àö√ë‚àö¬•?$

Which of these is an output of a ‚Äö√Ñ√∂‚àö√ë‚àö

1.	Which of these is an output of a ‚Äö√Ñ√∂‚àö√ë‚àö‚â§Furnace‚Äö√Ñ√∂‚àö√ë‚àö¬•?$
A.	Fuel gas
B.	Air
C.	Flue gases
D.	Water Vapor
Answer» D. Water Vapor