Mineral constituent of chlorophyll is

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Q: 29 (SSC/NA)
Mineral constituent of chlorophyll is

question_subject: 

Science

question_exam: 

SSC

stats: 

0,24,7,2,24,1,4

keywords: 

{'mineral constituent': [1, 0, 0, 0], 'chlorophyll': [5, 0, 1, 4], 'magnesium': [1, 0, 2, 3], 'calcium': [2, 0, 0, 4], 'potassium': [1, 0, 0, 2], 'iron': [0, 0, 1, 1]}