Which command will allow you to boot a router from a TFTP server for the image of c2900-universalk9-mz.SPA.151-4.M4.bin on the TFTP server of 192.168.1.2?

The command boot system c2900-universalk9-mz.SPA.151-4.M4.bin tftp://192.168.1.2 will configure the router for booting of the image named c2900-universalk9-mz.SPA.151-4.M4.bin from the 192.168.1.2 TFTP server. Under normal circumstances, this should not be used in production environments since the router boot process is dependent on the availability of the TFTP server. The commands boot tftp://192.168.1.2, boot tftp://192.168.1.2 c2900-universalk9-mz.SPA.151-4.M4.bin, and boot system tftp://192.168.1.2 c2900-universalk9-mz.SPA.151-4.M4.bin are incorrect.