Tar itself does not contain any carcinogens true or false?

There are several definitions of "tar" and several classifications of "carcinogens". So the answer is that the statement is both true and false or, more precisely, it depends. "Tar", the residue of burning tobacco, is not the same as the "tar" they put on roads. Radon gas is classified as a carcinogen because there is ample scientific proof that it causes cancer. On the other hand, there is no convincing scientific proof at all that secondhand smoke causes cancer - it's classified as such for political and other reasons.

Without precise qualification, the statement is meaningless. And the same goes for 100% of Tobacco Control Propaganda. But if you present it the right way to the gullible politicians and public.....