Question

Which of the following plant seeds are used as "Jeweller's weight"?

• A. Cajanus cajan
• B. Lens culinaris
• C. Glycine max
• D. Abrus precatorius

Answer 1

The correct option is D Abrus precatorius

• $Abrus$ $precatorius$ is commonly known as jequirity bean or rosary pea.
  
• The seeds of $Abrus$ $precatorius$ are very consistent in weight , even under different moisture conditions due to the water-impermeable seed coat.
  
• Formerly, Indians used these seeds to weigh gold using a measure called Ratti, where 8 Ratti = 1 Masha, 12 Masha = 1 Tola (11.6 Grams).

Thus, the correct answer is option D.