Hi Snehasish,
Here the steps to find the number of rule groups available for particular transformations or ALL.
Goto SE16. Provide below table
RSTRANGROUPT
Langu EN = EN
OBJVERS = A
Execute
Here you can see only TRANSFORMATION which is having multiple RULE GROUPs.
For Reference.
Image may be NSFW.
Clik here to view.
Thank you,
Nanda