43.
The answer is: A
Explanation
The correct option is A: Section 2(1).
This is because the term "lock-out" under the Industrial Dispute Act, 1947 is defined in section 2(1) as follows:
"2. Definitions.- In this Act, unless there is anything repugnant in the subject or context,-
(1) “lock-out” means the temporary closing of a place of employment, or the suspension of work, or the refusal by an employer to continue to employ any number of persons employed by him;"
This definition is also cited by various web sources that explain the concept and reasons of lock-out in industrial disputes.
Option B is incorrect as section 2(0) does not exist in the Act.
Option C is incorrect as section 3(1) deals with the constitution of works committee.
Option D is incorrect as section 2(m) defines "public utility service".