@prithvirajpatel for your phone the touch screen, the glass and the LCD are all "sandwiched" together to make this the display assembly. In your case, it is best to replace the complete Display assembly.
Look in the note of this guide [guide|133913] You'll find that "Some replacement screens for this phone come pre-installed in a new frame (a.k.a. chassis), which requires you to transplant all of your phone's internals and install a new battery. Make sure you have the correct part before starting this guide.
***There is a significant chance that you may break the unreinforced and fragile display panel during this procedure."***
It would be best to replace it with something like this [product|IF437-039]
Your phone uses an OLED screen and those are not cheap.