Using column chromatography,a mixture of two compounds '$A$' and '$B$' was separated. '$A$' eluted first,this indicates '$B$' has

  • A
    low $R_f$,weaker adsorption
  • B
    high $R_f$,stronger adsorption
  • C
    high $R_f$,weaker adsorption
  • D
    low $R_f$,stronger adsorption

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