I want to buy a bike under INR 100K, which one should I buy - Suzuki Gixxer SF, Yamaha or Bajaj Pulsar?

The best bike under INR 1 lakh is the Bajaj Pulsar AS200. The adventure series Pulsar comes with a 199.5 cc, liquid cooled engine producing 23.17 BHP and 18.2 NM of torque. It comes with a disc brake for each wheel, making it good in terms of overall performance and handling. It comes with features like a windshield for wind blast protection on highways, a front projector headlamp for a steady and strong beam of light and a comfortable upright riding position with raised handlebar for better riding experience. The bike has been priced at INR 91,500 and brings a lot of practical biking experience than others in the segment.

Bajaj Pulsar AS200 - Adventure Never Stops

Depends on what you want. If you want performance (i.e a fast bike) you should go for the Pulsar 200 NS. I don't really like its look but that depends on people. This (or the Pulsar AS200) is the fastest bike you will get below 1 Lakh. Pulsar 200NS is better than the Pulsar 220 in all regards. Suzuki Gixxer SF has no disc brakes. I personally do not like its looks either. So I don't recommend it. It also doesn't have a 6th gear and lacks performance compared to 200NS. Yamaha FZ is a reliable, popular ride that looks good and has good mileage. However it has less power compared to Pulsar 200NS. FZ should be the bike you should buy for daily use if you don't mind the considerably small power output.