निम्नलिखित में से किसने 'मजदूरी का सौदेबाजी सिद्धांत' (Bargaining Theory of Wages) प्रतिपादित किया था?

Which of the following is a statutory employee benefit in India regulated under central labour laws?

Which specific provision was incorporated under Section 11A of the Maternity Benefit (Amendment) Act, 2017, to support working women in establishments employing 50 or more employees?