Which of the following is not a state function?

Which one of the following halogens liberates oxygen,when passed through hot concentrated $KOH$ solution?

$H_3BO_3$ is

The sensitivity of a galvanometer is $60 \text{ div/A}$. When a shunt is used,its sensitivity becomes $10 \text{ div/A}$. If the resistance of the galvanometer is $20 \ \Omega$,then the value of the shunt used is: (in $Omega$)

The total number of nitrogenous bases in the human genome is estimated to be about

The condition that $f(x)=a x^3+b x^2+c x+d$ has no extreme value,is