Buying a plot which is divided as 3 (2 original plots)

Most likely it is true, as B khatha land doesn't come within the jurisdiction of BBMP, it would come under local jurisdiction. However, I’d advise you to acquaint your friend with the idea of purchasing A khatha land instead, as in the case of having possession of B khatha land, one cannot obtain a building license (i.e. for construction on land) or trade license and neither is one eligible to apply for bank loans.

B khatha land can be bought/sold without any problems, however the prospective buyers would be less for the reasons mentioned above. It can be converted to A khatha land but then again you will have to pay the betterment charges and property tax (the payment of which the owner in this case is probably attempting to escape.) Hope this helps!  

Thanks for your reply

'Buyer Beware' applies to property deals.

It shall be appropriate to get proper legal opinion from a very able local senior counsel of unshakable repute and integrity specializing in revenue/property/civil matters before signing or making payment.

This may cost some FEE but can defend long term interest and hard earned monies.