Stereogram of a crystal shows primarily: a) the interfacial angles projected on the stereogram in the forms of arcs and straight lines. (b) the distribution of

Stereogram of a crystal shows primarily: a) The interfacial angles projected on the stereogram in the forms of arcs and straight lines. (b) The distribution of faces in the zones. (c) A symmetry in the distribution of faces. (d) All the above. Q.2 The two diameters of a stereographic projection representing the axes are always at: (a) 45 degrees. (b) 60 degrees. (c) 90 degrees. (d) 120 degrees.