Sivavij wrote: Is this possible -- upload all the photos in icloud drive using laptop but those photos shouldn't be reflect in my iphone or ipad. However if i take any new photos in iphone or ipad, that should be synced to icloud. Please advice.
That's option #3, I think. I haven't used Windows in several years, and I'm not sure how easily iCloud Drive works there. But, be sure you use iCloud Drive, not iCloud Photos
iCloud Drive is separate from iCloud Photos. So, storing folders of pictures in iCloud Drive doesn't change what you see in iPhone Photos or in iPad Photos. (iPhone & iPad behave the same way.) iPhone has a "Files" app to access iCloud Drive, so those pictures will be available to download to the iPhone, and only downloaded files take up space.
Photos will continue the same way-- new pictures will go from the iPhone to iCloud Photos, and then they'll be copied to iPad Photos. Photos on all devices will remain in sync. You can delete pictures on iPhone Photos, then they'll also be deleted in iCloud Photos and in iPad Photos, but nothing will not be changed in iCloud Drive.
When I go to iCloud.com, my page includes this:

iCloud Drive is a separate thing from iCloud Photos.