एक 'अल्पतंत्र' (Oligarchy) सरकार या राजनीतिक संरचना का एक रूप है जहाँ शक्ति का प्रभावी रूप से प्रयोग निम्नलिखित में से किसके द्वारा किया जाता है?

Which of the following countries does NOT have a parliamentary democratic system of government?

What is the most common form of democracy in the modern world?

Which of the following is considered a major demerit of the Presidential system of government?