Correct Answer - A
Comman Name : R is termed as alkyl.
`|{:(,"S.No","Compound","Name"),(,1,R-X,"Alkyl halide"),(,2,R-OH,"Alkyl alcohol"),(,3,R-SH,"Alkyl thio alcohol"),(,4,R-NH_(2),"Alkyl amine"),(,5,R-O-R,"Dialkyl either"),(,6,R-S-R,"Dialkyl thioether"),(,7,R-underset(O)underset(||)(C)-R,"Dialkyl keone"):}|`