Decreasing order towards SN 1 reaction for the following compounds is:

Match List I with List II

	List I		List II
A.		I.	Fittig reaction
B.		II.	Wurtz Fittig reaction
C.		III.	Finkelstein reaction
D.	$$\mathrm{C_5H_5C1+NaI\to C_2H_5I+NaCl}$$	IV.	Sandemyer reaction

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Identify the correct order for the given property for following compounds.

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The isomeric deuterated bromide with molecular formula $$\mathrm{C_4H_8DBr}$$ having two chiral carbon atoms is