Which of the following has maximum number of molecules [CBSE PMT 2002]

• A.                 16 gm of \[{{O}_{2}}\]       
• B.                 16 gm of \[N{{O}_{2}}\]
• C.                 7 gm of \[{{N}_{2}}\]         
• D.             2 gm of \[{{H}_{2}}\]