# The number of electrons involved in the manufacture of 1mole of $H_2O_2$ from 50% of $H_2SO_4$

$\begin{array}{1 1}(a)\;2moles\\(b)\;3moles\\(c)\;1mole\\(d)\;4moles\end{array}$

2 moles.
Hence (a) is the correct option.