Find the odd man out
(i) rickshaw puller who works under a rickshaw owner
(ii) mason
(iii) mechanic shop worker
(iv) shoeshine boy
Shoeshine boy is the odd man. All others (a rickshaw puller, a mason and mechanic shop worker) are hired workers who render their services to their employers and get remunerated in the form of salaries or wages.
On the other hand, shoeshine boy is self-employed.