Concept: The term “workman” under the Industrial Disputes Act includes many categories of employees, but certain categories are excluded.
Step 1: Understand included categories.
The definition of workman includes persons doing manual, skilled, unskilled, technical, operational, clerical or supervisory work, subject to certain conditions.
\[
\text{Workman} \Rightarrow \text{Manual + Technical + Clerical + Skilled work}
\]
Step 2: Understand exclusion.
Persons employed mainly in managerial or administrative capacity are excluded. Supervisors drawing wages above the prescribed limit are also excluded.
\[
\text{Supervisor above prescribed limit} \Rightarrow \text{Not workman}
\]
Step 3: Apply to the options.
Technical, clerical and skilled workers may fall within the definition. Supervisors earning over the prescribed limit are excluded.
Therefore, the correct answer is option (D).