Boyle's law expressed as following

$\mathrm{p}={\mathrm{K}}_1·\frac{1}{\mathrm{V}}$

where, p = pressure
V = volume
${\mathrm{K}}_1$ = proportionality constant

Which of the following option is true about constant (${\mathrm{K}}_1$)?

Value of ${\mathrm{K}}_1$, does not depend upon temperature of the gas

Value of ${\mathrm{K}}_1$, depends upon the amount of gas

Value of ${\mathrm{K}}_1$, is independent of the units of p and V

All of the above