Match List I (Oxdiation number) with List II (The element) and select the correct answer using the codes given below this lists

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Q: 110 (IAS/2002)
Match List I (Oxdiation number) with List II (The element) and select the correct answer using the codes given below this lists
(Oxidation number)(The element)
A. 21. Oxidation number of Mn in MnO2
B. 32. Oxidation number of S in H2S2O7
C. 43. Oxidation number of Ca in CaO2
D. 64. Oxidation number of Al in NaAIH4
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question_subject: 

Science

question_exam: 

IAS

stats: 

0,9,8,9,5,2,1

keywords: 

{'oxdiation number': [0, 0, 1, 0], 'element': [0, 0, 0, 1]}