The correct option is D 5 years
Every
employee irrespective of his wages is entitled to receive gratuity
after he/she has rendered continuous service for 5 years or more.Every
employer of a shop or establishment, employing 10 or more persons
comes within the purview of the Payment of Gratuity Act, 1972.In 1972, Payment of Gratuity Act was passed. Gratuity is one of the
retirement benefits received by the employees when they leave a company.