How To Assign Plot Numbers For Plots That Have Been Sub-Divided

I am buying a Residential Plot in Chennai within a layout. The seller is holding 4 Plots as Plot Nos 38A (2400 Sq Feet), 38B (2400 Sq Feet), 39A (2250 Sq Feet) & 39B (2250 Sq Feet) and these 4 plots have now been divided and sold as 3 plots to satisfy the land & building plan approval criteria. The extent for the 3 plots A, B & C has been carved out of Plot Nos 38A, 38B, 39A & 39B. The new plots have been divided as Plot A – Now measuring 3300 Sq Feet – 2400 Sft taken from Plot 38A & 900 Sft taken from Plot Plot 38B Plot B – Now measuring 3000 Sq Feet – 1500 Sft taken from Plot 38B & 1500 Sft taken from Plot 39A Plot C – Now measuring 3000 Sq Feet – 750 Sft taken from Plot 39A & 2250 Sft taken from Plot 39B The query I have is Should the Plot numbers be registered as Plot No 38&39A (38A & 38B Part); Plot No 38&39B (38B Part & 39A Part); Plot No 38&39C (39A Part & 39B); Shall appreciate advise and opinions of the expert members in this forum