1. Khesari Dal
  2. Castor bean
  3. Soya bean
  4. Guar gum
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1 Answers

Option 2 : Castor bean

Ricin is a toxin that is fatal to humans in extremely small doses. Just 1 milligram is a deadly amount if inhaled or ingested, and only 500 micrograms of the substance would kill an adult if it were injected. Ricin comes from the castor bean plant (Ricinus communis) which is present in the mash that is left over after grinding castor beans into oil.
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