Reaction between which of the following two reactants will produce hydrogen gas?

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Q: 3 (CDS-II/2018)
Reaction between which of the following two reactants will produce hydrogen gas?
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question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,28,32,28,4,24,4

keywords: 

{'hydrogen gas': [0, 0, 1, 2], 'reactants': [0, 0, 0, 3], 'reaction': [1, 0, 5, 18], 'nitric acid': [0, 0, 0, 2], 'hydrochloric acid': [1, 0, 3, 0], 'magnesium': [1, 0, 2, 3], 'calcium carbonate': [0, 0, 1, 4], 'zinc': [1, 0, 0, 2], 'copper': [1, 0, 1, 1], 'dilute': [0, 0, 0, 4]}