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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
When you rinse them in cold water, they should close. It they don't close, it means they are dead and must be disposed of. When you cook them, they will open up again. If they are not open when cooked, throw them away. Don't try to open them, it means they are not edible.
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