Question $16$

What is the standard use of register R$14?$ Register R$13?$ Register R$15?$

R$13=$ Stack Process, R$14=$ Link Stack and R$15=$Program Counter

$R10=SP,R12=LR$ and $R13=PC$

R$15=$ SP $($Stack Process$),$ R$14=$ LR $($Link Resul$)$ and R$13=$PC $($Process Counter$)$

$R13=SP,R14=LR$ and $R15=PC$