Which of the following statements are correct regarding employees state insurance act 1948?        
I.            The Employees State Insurance applies to the factories and other establishments institutions where 10 or more persons are employed .      
II.            This act covers factories, hotels, cinemas and educational institutions as well.    
III.            Employees of the aforesaid categories of factories and establishments, drawing wages up to Rs. 25,000/- a month, are entitled to social security cover under the ESI Act .