A glass flask is filled up to a mark with 50 cc of mercury at 18ºC. If the flask and contents are heated to 38ºC, how much mercury will be above the mark? (a for glass is 9 × 10?6/ºC and coefficient of real expansion of mercury is 180 × 10?6/ºC) [EAMCET 1997]

• A.            0.85 cc                                     
• B.            0.46 cc
• C.            0.153 cc                                  
• D.            0.05 cc