Upload an iOS app in AppStore, compatible for a particular iOS version or for a particular device alone

Question

Since iOS 7 had been released a few months ago, lets say I haven't made any changes to make my app compatible for iOS 7. So, now(Jan 2014) can I upload my app in the Appstore and make it compatible for iOS 6 alone?

Also, can I make my app compatible for a particular iPhone Device alone(say, iPhone 4)?
If I do so, will Apple approve my app?

Answer 1

1st "Starting February 1, new apps and app updates submitted to the App Store must be built with the latest version of Xcode 5 and must be optimized for iOS 7" - Appel Doc.

2nd: You can not make app compatible for a particular iPhone Device alone (say, iPhone 4), but you can make app only for iPad.

Answer 2

First of all you cant upload app for iOS6 only and not for iOS7.
And Second you cant add app for device specific.
You can either add it for the iPhone or iPad or Universal (Both).

And you dont want to exclude the iOS7 from your new update bcoz of apple's new statement.

Starting February 1, new apps and app updates submitted to the App Store must be built with the latest version of Xcode 5 and must be optimized for iOS 7.