Do you have Windows Fast Boot enabled? If so, disable that, or else the kernel will regard the filesystem as dirty and will mount it read-only.
I also recommend adding rw as a mount option to the filesystem, like so… 
/dev/sda1 /home/abhi/Data ntfs-3g auto,rw,defaults,uid=1000,gid=1000,umask=022,utf8 0 0