Which of the following statements is not true ?
- MPI_Isend and MPI_Irecv are non-blocking message passing routines of MPI.
- MPI_Issend and MPI_Ibsend are non-blocking message passing routines of MPI.
- MPI_Send and MPI_Recv are non-blocking message passing routines of MPI.
- MPI_Ssend and MPI_Bsend are blocking message passing routines of MPI.