father sold land without my knowledge

Since the property in the name of your father (notwithstanding the fact that you might have given the complete funds for purchasing the same), he has every right to dispose of the property in whichever way that he likes.  He need not consult any one (including you) before selling the said property. 

You did a mistake by purchasing the property in your father's name.  When it is in your father's name it amounts to that it is his self acquired property.

If you want to challenge it  you have to file a suit for cancellation of sale deed but heavey burden lies on you to prove that you purchased the property.

it is a benami transaction.  But you to approach the concerned civil court for proper remedy for declaration and cancellation of sale deed.
 

no father has full right to dispose the property and no one can challenge it .

Mr. raj kumar, Most of professional ethics and some minute points will not be disclosed publicly without obtaining fees.  So kindly consult some lawyer.  

As per law your father is entitled to dispose of the property as he wish since the property is registered in his name irrespective of the fact that your have arranged the funds. If at all you want to challege the said sale you may approach the civil court of cancellation of sale deed subject to strict proof of the fact that you have sourced the funds not by your father.

Your father had every right and title in the said land and also he ha d every right to sell the same without any consultation with you. You cannot get teh sale deed cancelled. under any circumstances under the law

However, if you can show that the money was paid by you to your father, that money can be claimed by you by filing a suit for recovery of money.

sachin agrawal is right