The correct option is B created through an Act of Parliament in 1977
The post of Leader of Opposition in the Lok Sabha received statutory recognition through the Salary and Allowances of Leaders of Opposition in Parliament Act, 1977 which defines the term "Leader of the Opposition" as that member of the Lok Sabha or the Rajya Sabha who, for the time being, is the Leader of that House of the party in Opposition to the Government having the greatest numerical strength and recognised, as such, by the Chairman of the Rajya Sabha or the Speaker of the Lok Sabha.