A Rectangular Plate (A =120 Mm, B = 160 Mm) $\sigma _ { x } = - 4.5 \mathrm { MPa }$

A rectangular plate (a =120 mm, b = 160 mm) is subjected to compressive stress $\sigma _ { x } = - 4.5 \mathrm { MPa }$ tensile stress $\sigma _ { y } = 15 \mathrm { MPa }$ . The ratio of the normal stress acting perpendicular to the weld to the shear stress acting along the weld is approximately:

A) 0.27
B) 0.54
C) 0.85
D) 1.22