[" Ihe equation of a line passing through "(a,b)],[" and parallel to the line "x/a+y/b=1" is - "],[[" (A) "x/a+y/b=0," (B) "x/a+y/b=2],[" (C) "x/a+y/b=3," (D) "x/a+y/b+2=0]]