Guys Mine iPhone is Jailbroken on 7.0.6 Thats why I wasn't able to do that,,, BUT THE STEPS ARE
1. Open iCloud In Setting
2. Try turning off Find My iPhone & Delete account simultaneously
3. Then turn off the iPhone from there
3. After Booted On, jump to ICloud & Click'DELETE ACCOUNT'
FROM THERE SELECT DELETE FROM iPhone
ONCE CLICKED U WOULD BE DONE & ENTER ANY ACCOUNT