[" A block of mass "10kg" is suspended "],[" through two light spring balances as "],[" shown in the figure."],[" (A) Both the scales will read "10kg],[" (B) Both the scales will read "5kg],[" (C) The upper scale will read "10kg],[" and the lower zero."],[" (D) The readings may be anything but "],[" their sum will be "10kg" ."]