He also admitted to causing injuries to 14 others including the truck driver, all Indians, due to his negligence.
In a sentencing on Tuesday, District Judge Lee Poh Choo took into consideration the charge of causing injury to other passengers of the vehicle.
Assistant Public Prosecutor Andrew Low had sought a jail term of two to three months and a driving ban of five to eight years as the accident was solely caused by Jayaprakash.
There were a number of aggravating factors, said Low, pointing out that Jayaprakash overtook an unknown vehicle and crashed into the truck, throwing Kathiravan off the lorry.
Pleading for leniency, wheelchair-bound Jayaprakash said he has not been able to walk for the past 10 months after the accident and does not know what the future holds.