Three projectiles A, B and C are thrown simultaneously from the same point in the same vertical plane. Their trajectories are shown in the figure. Then which of the following statement(s) m is/are correct

Since maximum height attained by all is same, so their time of flight and vertical component of velocity will be same. If vertical component of velocity is same, their height or y-coordinate at any time will be same. Now range of C is greatest, so its horizontal component of velocity is greatest. Hence, overall launch speed of C is also greatest.