clear glass and green glass. paper cups and plastic cups. iron nails and aluminum nails. sand and salt.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A strong magnet will separate a mixture of
Possibilities:
- clear glass and green glass.
- paper cups and plastic cups.
- iron nails and aluminum nails.
- sand and salt.

iron nails and aluminum nails.