Apollo Alnac 4G S would be a good tyre to begin with for your Optra Magnum. In case you want something better then Yokohama A- Drive AA01 would be a good tyre
Another good tyre , although slightly expensive, would be Hankook Optimo Me02 K424.
If you wanted performance oriented tyres then go for Yokohama S Drive or Bridgestone Potenza GIII.
I own elite i20 with tyre specifications 195/55 r16. Not happy with tyres that came from company. Grip is not that good. And there are lots of cracks on tyre as I drive in hilly areas. Suggest me some good tyre. And I want to upsize tyre. I want more wide tyre.. Please help.