Number of gram-atoms in 8 g of He are

• A.  2                                              
• B.  \[\text{1}.\text{2}0\text{4 }\times \text{ 1}{{0}^{\text{24}}}\]
• C. \[\text{3}.\text{1}0\text{ }\times \text{ 1}{{0}^{\text{23}}}\]                     
• D.  None of these