54f

The lawyer is correct. You can gift plot B before or even purchase it from ownself to HUF, to utilize more sell proceeds from sell of plot A.

Sir, that means after that I will be able to get Exemption under section 54 f for construction of house. . ? ? 

Yes, you can, provided HUF does not own more than one house on the date of sale of plot A. Secondly, you just need to make a deed of permission of use on long term of plot B, by individual to HUF.

Thank you very much sir.. :) Just one last question, does that mean I don't have to execute a gift deed..?? Because a hefty amount of stamp duty is charged on gifts. . 

Yes, just permission to use or long term lease deed will be sufficient for land part.

Thank you very much sir. .  

Really appreciate it. 

Have a good day. .  :) 

Thanks and very good luck.