The T-72 KMT-5 in the Indian OOB (obat18/ Unit 212) is classed as an Engineer Tank. I believe it may be a Mine Clearing Tank in game terms because it is equipped with a Russian KMT-5 combined mine roller and plough. The T-72 KMT-5 in the Russian OOB (obat 11/ Unit 493) is classed as a Mine Clearing Tank.
......... and it's that way for the simple reason that there are only enough engineer/mineclearing tanks in that OOB to fill one formation from start to finish. That's another reason why both types can handle both tasks