, x 2 + y 2 - 3x + y = 0

, x 2 + y 2 + x + 3y = 0

and x 2 + y 2 + 2y- 1 = 0

. ONLY ONE of these four options is the correct answer. • Four each question, choose the option corresponding to the correct answer. • Answer to each question will be evaluated according to the following marking scheme: Full Mark +3 If only the correct option is chosen; Zero Marks 0 If none of the options is chosen (i.e. the question is unanswered) Negative Marks -1 In all other cases. Consider a triangle A whose two sides lie on the x-axis and the line x + y + 1 = 0. If the orthocentre of A is (1, 1), then the equation of the circle passing through the vertices of the triangle A is x 2 + y 2 + x + y = 0