As per factories act which among the following are true in respect of the_______ definition of a worker'? [Sec 2(1)] 'Worker' means a person employed 1 Directly or by or through any agency (including a contractor 2 With or without the knowledge of the principal employer 3 Whether for remuneration or not 4 In any manufacturing process

Industrial relations is about the relationship between the administration and the employees of an organization at the workplace. 
Minimum Wages Act, 1948, Factories Act, 1948, Maternity Benefits Act, 1961, Payment of Bonus Act, 1965 are some important labor laws in India.