Correct Option
The fundamental characteristic of a parliamentary system of government is the principle of collective responsibility of the executive to the legislature. In India, this is enshrined in Article 75(3) of the Constitution, which states that the Council of Ministers shall be collectively responsible to the Lok Sabha. This implies that the government remains in power only as long as it enjoys the confidence of the directly elected house of Parliament, ensuring accountability of the executive to the popular will.
Incorrect Options
Option (a):
The direct election of the Lok Sabha by the people is a feature of representative democracy and ensures popular sovereignty in the lower house. However, this characteristic is not exclusive to a parliamentary system; many presidential systems also feature directly elected legislatures. Therefore, it does not singularly define a parliamentary form of government.
Option (b):
The power of the Parliament to amend the Constitution is a feature of a sovereign legislature within a constitutional framework, indicating its constituent power. This ability is present in various forms of government, including presidential systems, and is not a distinguishing feature that defines a parliamentary system over others.
Option (c):
The Rajya Sabha being a permanent house that cannot be dissolved is a specific structural feature of the Indian Parliament, contributing to its bicameral nature and federal balance. While important, this characteristic pertains to the composition and stability of one house of the legislature, rather than being a defining principle of the parliamentary system of government itself.