Consider the following statements:
State of stress in two dimensions at a point in a loaded component can be completely specified by indicating the normal and shear stresses on
1. A plane containing the point
2. Any two planes passing through the point
3. Two mutually perpendicular planes passing through the point
Which of these statements are correct?
(a) 1 and 3 (b) 2 only
(c) 1 only (d) 3 only