Government contract Work

Yes, you can claim ITC.
Goverment work contracts will be liable to pay 12% gst.

(In Government contract) For Concrete road, Can i take ITC on cement & Iron purchase?

Yes you can claim ITC.

@ Vinod Babu sir, send me is there any notification available about this topic...
Please,

As per section 17(5)

c] works contract services when supplied for construction of an immovable property [other than plant and machinery] EXCEPT where it is an input service for further supply of works contract service;

Means :ITC for works contract can be availed only by one who is in the same line of business and is using such services received for further supply of works contract service

For Example : Worker contractor providing service to End customer. (whether registered or not)
Work contractor can take ITC in his inward supplies , but the customer cant.

Henc You can claim ITC on your inward supply (which you have further supplied Govt)

Good explanation Pankaj ji....