To compare the current state of file with any of its previous commit, the command used is‘git diff __’ where diff is followed bySelect one:Commit hash of that previous commitName of any commitAll of themName of previous commit

The correct answer is: Commit hash of that previous commit.

Here's the step by step explanation:

1. 'git diff' is a command used in Git, a version control system, to show changes between commits, commit and working tree, etc.

2. The 'git diff' command followed by the commit hash of a previous commit is used to compare the current state of the file with that specific previous commit.

3. The commit hash is a unique identifier for each commit. It is a 40-character string composed of characters (0-9 and a-f) and calculated based on the contents of a directory tree structure in Git.

4. So, if you want to compare the current state of your file with any of its previous commits, you would use the command 'git diff' followed by the commit hash of the previous commit you want to compare it with.

For example, if your commit hash is abc123, you would use the command 'git diff abc123'. This will show you the differences between the current state of the file and the state of the file at the time of the commit with the hash abc123.