Why can't I see bg and nointr option by mount command on RHEL7 NFS client?

Issue

• After NFS mount on RHEL7 by the following command line, I can't see 'bg' and 'nointr' options in the result of mount command. Why can't I see them?

[root@nfsclient ~]# mount -t nfs ${NAS_VOL} ${MOUNTPO} -o rw,bg,hard,nointr,rsize=32768,wsize=32768,tcp,actimeo=0,vers=3,timeo=600

[root@nfsclient ~]# mount |grep nfs
nfsserver:/exports on /mount/point type nfs (rw,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,acregmin=0,acregmax=0,acdirmin=0,acdirmax=0,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=XX.XX.XX.XX,mountvers=3,mountport=4046,mountproto=tcp,local_lock=none,addr=XX.XX.XX.XX)