Biology · Vitamins
विटामिन-B12 (साइनोकोबालिन) में कौन सा विशिष्ट खनिज तत्व पाया जाता है?
- 1जिंक
- 2कोबाल्ट✓
- 3मैग्नीशियम
- 4लोहा
सही उत्तर देखें
कोबाल्ट
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