You can determine which versions of which products are compatible with one another by using the vRealize Automation support matrix and the VMware product interoperability matrices.
vRealize Automation Support Matrix
You can discover which versions of supported external applications are available for each vRealize Automation 7.x version by using the vRealize Automation Support Matrix.
The vRealize Automation Support Matrix is available at https://www.vmware.com/pdf/vrealize-automation-6x7x-support-matrix.pdf.
VMware Product Interoperability Matrices
You can discover which versions of supported VMware products work with one another by using the VMware Product Interoperability Matrices.
The VMware Product Interoperability Matrices are available at http://partnerweb.vmware.com/comp_guide2/sim/interop_matrix.php.