A boy whose mass is 50kg stands on a spring balance inside a lift. The lift starts to ascent with an acceleration of \[2m{{s}^{-2}}.\] The reading of the machine or balance \[(g=10\,m{{s}^{-2}})\]is [Kerala PET 2002]

• A.             \[50\,kg\]         
• B.             Zero
• C.             \[49\,kg\]         
• D.             \[60\,kg\]