The main cause of beri-beri disease is:

  • A
    Vitamin $B_1$ deficiency
  • B
    Vitamin $B_2$ deficiency
  • C
    Vitamin $B_6$ deficiency
  • D
    Vitamin $B_{12}$ deficiency

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Which one of the following is a fat-soluble vitamin and its related deficiency disease?

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Which vitamin deficiency causes night blindness?

What conditions arise due to the deficiency of Vitamin $A$?

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