Dnone-or these- 55. let u= the set of all triangles, p = the set of all isosceles triangles, o = the set of all equilateral triangles, r=the set of all right an

dNone-or these- 55. Let U= the set of all triangles, P = the set of all isosceles triangles, O = the set of all equilateral triangles, R=the set of all right angled triangles. What do the sets PnQ and R-P represents respectively? (a) The set of isosceles triangles; the set of non-isosceles right angled triangles (b) The set of isosceles triangles; the set of right angled triangles (c) The set of equilateral triangles; the set of right angled triangles (d) The set of isosceles triangles, the set of equilateral triangles 56-fthe setszt ard-Barcdetieg as