Molar mass of hydrogen = 2 "g\\ mol^{-1}"
So particles of hydeogen in 2 gm hydrogen = "6.022\\times 10^{23}" particles
So particles of hydrogen in 1 gm hydrogen = "\\frac{1}{2}\\times 6.022\\times 10^{23}=3.011\\times 10^{23}" particles
So, No one is correct .
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