GST under reverse charge - Goods and Services Tax - GST

XYZ (Proprietor) is providing bus service for transporting employees of PQR Ltd. (Body Corporate). XYZ (Proprietor) also supplying Motor Cars for the employees of PQR (Ltd.) for their official work of the company and not charging 12% (6% + 6%) GST in both the cases. Is under both the situations, PQR Ltd. (Body Corporate) is required to pay GST under reverse charge? If yes, whether once it is paid, PQR can claim ITC of the same?