Teaching CTET (Paper 1 & Paper 2) Mock Test Series 2025 Environmental Studies Food Food Spoilage & Preservation

प्राचीनकाल में, खाद्य परिरक्षण ___________ किया जाता था।

1
सुखा कर
2
नमक लगाकर
3
धुआँ देकर
4
सभी
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