Which of the following is the representation of a plane algebraic curve of nth degree?

• A. f(x,y)=ayn+(bx+c) yn-1+(dx2+ex+f) yn-2+⋯+un (x)=0
• B. f(x,y)=ayn-1+(bx+c) yn-2+(dx2+ex+f) yn-3+⋯+un (x)=0c) f(x,y)=ayn+byn-1+cyn-2+⋯+un (x)=0d) f(x,y)=ayn+(bx+
• C. yn-1+(dx2+ex+f) yn-2+⋯+un (x)=0b) f(x,y)=ayn-1+(bx+c) yn-2+(dx2+ex+f) yn-3+⋯+un (x)=0c) f(x,y)=ayn+byn-1+cyn-2+⋯+un (x)=0
• D. f(x,y)=ayn+(bx+c) yn+(dx2+ex+f) yn+⋯+un (x)=0