Tap the gear- or slider-shaped icon in the App Drawer. You'll find this near the top of the Settings page. You may have to tap Accounts on a Samsung Galaxy phone. This will open the Google accounts section. Tap the account that you want to sign out of Gmail. You cannot select the Google account that you used to set up your Android phone. It's in the top-right corner of the screen. A drop-down menu will appear. Doing so will remove the Google account from your Android and any apps that use it, including Gmail.
अपने एंड्राइड की सेटिंग खोलें: नीचे "Accounts" भाग तक स्क्रॉल कीजिये: Google पर टैप करें: एक अकाउंट चुनें: ⋮ पर टैप करें: Remove account पर टैप करें: