(A) Pentanone-3 does not give yellow pricipitate of iodoform with `I_(2)//NaOH` whereas Pentanone-2 gives a yellow precipitate of iodoform with `I_(2)//NaOH`.
(R) Compound containing `(CH_(3)-CO-)` group i.e., methyl ketones or alcohols which on oxidation yield an aldehyde or ketone with `CH_(3)CO-` group undergo Haloform reaction.