Which of the following statement is correct?
A) Decreasing order of density of alkyl halides is $\mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$
B) The stability order of alkyl halides is $\mathrm{RF}>\mathrm{RCl}>\mathrm{RBr}>\mathrm{RI}$
C) Among isomeric alkyl halides the decrease in boiling point is $1^{°}>2^{°}>3^{°}$