A vitamin requires cobalt for its activity. The vitamin is

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Q: 85 (SSC/NA)
A vitamin requires cobalt for its activity. The vitamin is
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question_subject: 

Science

question_exam: 

SSC

stats: 

0,15,6,15,2,4,0

keywords: 

{'vitamin': [16, 0, 0, 3], 'vitamin b12': [2, 0, 0, 0], 'cobalt': [0, 0, 0, 1], 'vitamin b2': [1, 0, 0, 0]}