What is the absolute pressure at A measured by an open tube manometer as in the figure above? Assume atmospheric pressure as 103 kN/m2 ; SA and SB are the specific gravities of the two fluids)
(A) 78.5 kN/m2 (B) 180 kN/m2
(C) 1030 kN/m2 (D) 103 kN/m2