from
/dev/sdc1 : start=     2048, size=734003200, Id=fd
/dev/sdc2 : start=734005248, size=   204800, Id=fd, bootable
/dev/sdc3 : start=734210048, size=3170084864, Id=83
/dev/sdc4 : start=        0, size=        0, Id= 0

to

/dev/sdc1 : start=        0, size=        0, Id= 0
/dev/sdc2 : start=        0, size=        0, Id= 0
/dev/sdc3 : start=     2048, size=3170084864, Id=83
/dev/sdc4 : start=        0, size=        0, Id= 0