Labour welfare movement has witnessed some distinctive developments. They are 1. Voluntary organisations engaged in labour welfare expanded in number and influences. 2. State through legislations tried to regulate and improve the lot of labour. 3. Some enlightened employers took the initiative to improve the working and living conditions of labour. 4. Trade Unions fought to bring about an improvement in the working conditions of labour and to raise their status socially and economically. Arrange the developments in correct order from latest to earliest.

Answer: Option B