The correct option is C Tangential stress
The transformation equations for plane stress can be represented in graphical form by a plot known as Mohr's Circle. This graphical representation is extremely useful because it enables to visualize the relationships between the normal and shear stresses acting on various inclined planes at a point in a stressed body. Using Mohr's circle the principal stresses, maximum shear stresses and stresses (normal as will as tangential) on inclined planes can also be calculated.