Concept: Section 25C of the Industrial Disputes Act provides compensation to workmen who are laid off, subject to statutory conditions.
Step 1: Understand lay-off compensation.
Lay-off compensation is paid because the workman is willing to work but is not given work due to reasons like shortage of power, raw material, breakdown of machinery or similar reasons.
Step 2: Identify the statutory amount.
Section 25C provides compensation equal to fifty percent of the total of basic wages and dearness allowance.
\[
\text{Lay-off compensation} = 50\%(\text{Basic wages} + \text{Dearness allowance})
\]
Step 3: Select the correct option.
The correct option includes both basic wages and dearness allowance.
Therefore, the correct answer is option (D).