The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X-plate input is 2 sin ωt, the Y-plate input is

• 2 sin ωt
• 2 sin (ωt + 45°)
• 2 sin (ωt - 45°)
• 22 sin ωt + 45°)