Identify the casual worker from amongst the following alternatives :

Santu, who works on the farm of Sohan as he doesn't own land of his own.

The casual worker among the given alternatives is: Santu, who works on the farm of Sohan as he doesn't own land of his own.

A casual worker is typically someone who is employed on a short-term or irregular basis without a long-term commitment from the employer. Santu, working on the farm and not owning land, suggests a casual or temporary employment arrangement.

The other options describe individuals in more stable or independent professions. Raghav, Angad, and Radha all represent positions that are typically associated with regular employment, involving ownership (restaurant), professional practice (lawyer), or established positions (nurse).