Is there automatic gear car available in India?
Nope, Not now it's going to come in 2025 flying cars will launch on India.
Why does your automatic car jerk when accelerating and coming to a stop and the dash display shows that it is not in any gear?
Manual control means that it is controlled by humans, and automatic is it will work on its own. An example is a car's transmission. With manual transmission, you have to tell the car what gear to use. With automatic transmission, the car figures out what gear to use on its own by monitering factors such as RPM.