The number of milli moles of solute present in 10 ml of decimolar solution is

A decimolar solution is a $0.1\mathrm{M}$ solution, which has $0.1$ moles glucose in a litre of solution.
Let, x moles of glucose in $10\mathrm{ml}$of solution
$\Rightarrow \left(\mathrm{x}\right)\left(1000\mathrm{ml}\right)=\left(10\mathrm{ml}\right)(0.1\mathrm{moles})$
$x={10}^{-3}$ moles
$\mathrm{x}=1$ millimoles
$\Rightarrow$1millimoles of solute present in $10\mathrm{ml}$ of decimolar solution.

So, the required answer is option A) 1