Hi Swathi,
The standard Stock reports MMBE and MB52 are straight forward. You get stock for what you provide in selection screen.
From your comments it appears that the materials in question are alternate materials in BOM and if that is the case it is a valid scenario. Reason can be many like price, quality and availability from vendor.
However, your exact requirement cannot be met via standard reports. Best Standard Option would be to use MB52 report and filter it by using Material Type and Material Group in the scope of list and select No zero Stock Lines. Something like this.
Regards,
Niranjan