Find the odd man out (i) rickshaw puller who works under a rick- shaw owner (ii) mason (iii) mechanic shop worker (iv) shoeshine boy.

Shoe shine boy is a odd man out. All others (a rickshaw puller, a mason, and mechanic shop worker) are hired workers. They render their services to their employers and receive rewards in the form of salaries or wages in return. On the other hand, shoe shine boy is a self-employed worker and carries out his occupation himself. In other words, he is engaged in his own profession.