alleryসূৰ্যৰ অতিবেঙুনীয়া পোহৰৰ সংস্পৰ্শলৈ অহা ছালৰ কোষত কোনটো ভিটামিন সংশ্লেষিত হয়?
Aভিটামিন D
Bভিটামিন A
Cভিটামিন E
Dভিটামিন C
Answer & Solution
Correct answer: A. ভিটামিন D
সূৰ্যৰ পোহৰত থকা অতিবেঙুনীয়া B ৰশ্মিয়ে ছালৰ বহিঃত্বকত ভিটামিন D-ৰ আলোক-ৰাসায়নিক সংশ্লেষণ আৰম্ভ কৰে।
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