A one litre glass flask contains some mercury. It is found that at different temperatures the volume of air inside the flak remains the same. What is the volume of mercury in this flask if coefficient of linear expansion of glass is 9 ´ 10?6/°C while of volume expansion of mercury is 1.8 ´ 10?4/°C

• A.            50 cc                                        
• B.            100 cc
• C.            150 cc                                      
• D.            200 cc