For a general reaction written as A$+$B $->$ C$+$D that is first order in $[$A$],$ which is the right equation to linking the initial and final concentration of A to the elapsed time?

Question $5$ options:

ln$[$A$]=$ ln$[$A$0]-$ k$\backslash$times t;

All options are incorrect;

ln$[$A$]=$ k$\backslash$times t $+$ ln$[$A$0]$;

ln$[$A$]=-$k$\backslash$times t $-$ ln$[$A$0]$;

ln$[$A$]=$ k$\backslash$times t $-$ ln$[$A$0]$;