【Daily Question No. 63】January 11, 2016: +2 wealth for participation, +3 wealth for a correct answer

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To boost activity on the food section, a daily quiz campaign is launched starting today: participants earn +2 wealth points for taking part, and an additional +3 wealth points for answering correctly. This initiative aims to enhance the atmosphere in this section, spread basic knowledge about food, and provide users with certain wealth rewards. (Multiple choice) Among the following vitamins, a deficiency in ( ) will cause abnormalities in red blood cells in the human body; this vitamin is found only in animal-based foods. Therefore, a long-term vegetarian diet can pose serious health risks. A Folic acid B VC C VB1 D VB12 Please reply with the answer you think is correct in the comments; answering correctly earns +2 wealth points. Getting all answers right adds another +3 wealth points. Additional rewards will be given for providing detailed explanations or analyses of the questions and answers. Note: We will close this post after 24 hours. Outside of answering questions, I hope everyone can share their suggestions~ Feel free to express any ideas regarding the daily question or anything else~