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1.	‚Äö√Ñ√∂‚àö√ë‚àö‚â§ C-C‚Äö√Ñ√∂‚àö√ë‚àö¬• linkage are cleaved by what in hydrogenation?$
A.	Catalyst
B.	Nickel
C.	Hydrogen
D.	Zinc
Answer» C. Hydrogen