The orthocentre of a triangle is the point where _______ .
Which of the following statements is / are correct statements? 1. Centroid of a triangle is the point of concurrrency of medians 2. Incentre of a triangle is the point of concurrency of perpendicular bisectors of the sides of the triangle 3. Circumcentre of a triangle is the point of concurrency of internal bisectors of the angles of the triangle 4. Orthocentre of a triangle is the point of concurrency of altitudes of the triangle drawn from one vertex to opposite side 5. A triangle can have only one excentre