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

In column chromatography, the component that elutes first has weaker adsorption to the stationary phase (adsorbent).

Since A eluted first, A has weaker adsorption. This means B has stronger adsorption (retained longer on the column).

In terms of R$$_f$$ value (from TLC): A would have a higher R$$_f$$ (moves further) and B would have a lower R$$_f$$ (moves less, stronger adsorption).

The correct answer is Option 1: low R$$_f$$, stronger adsorption.