The 13th G20 Summit held in 2018 took place in which country?

Introduction / Context:
The Group of Twenty, or G20, is a major international forum for governments and central bank governors from the worlds largest economies. Each year, one member country hosts the G20 leaders summit. Exam questions in general knowledge often ask where a particular summit was held, especially when the summit discussed important global issues. The 13th G20 Summit took place in 2018, and remembering its host country is an important current affairs fact.

Given Data / Assumptions:

We are dealing with the 13th G20 Summit held in 2018.
The options list India, Japan, Argentina, and None of the above.
We assume the question is about the leaders summit, not a preparatory ministerial meeting.
The exam expects you to know the host country for that summit.

Concept / Approach:
Each G20 summit is hosted by a rotating member country. For 2018, the summit was hosted in Buenos Aires, which is the capital city of Argentina. Many current affairs capsules before various competitive exams repeatedly mentioned that the 13th G20 Summit was held in Argentina, highlighting it as the first G20 summit in South America. By connecting the year 2018, the 13th summit sequence, and the city Buenos Aires, you can identify Argentina as the correct host country from the options.

Step-by-Step Solution:
Step 1: Note that the question specifies the 13th G20 Summit and the year 2018. Step 2: Recall that in 2018, news reports frequently mentioned the G20 leaders gathering in Buenos Aires. Step 3: Recognise Buenos Aires as the capital city of Argentina. Step 4: Among the options, identify Argentina as the country associated with Buenos Aires. Step 5: Choose Argentina as the correct answer, since neither India nor Japan hosted the 13th summit in that year.

Verification / Alternative check:
You can recall other years for comparison. India hosted the G20 summit in 2023, not 2018. Japan hosted the summit in 2019 at Osaka. Argentina is thus the only option that matches the year 2018 and the 13th summit number. If you remember that it was the first G20 summit ever held in South America, that detail also points directly toward Argentina, further verifying your answer.

Why Other Options Are Wrong:
India: A G20 member and later host, but it did not host the 13th summit in 2018. Japan: Hosted the G20 summit in 2019, not the 2018 edition. None of the above: Incorrect because Argentina, one of the listed options, is in fact the correct host country.

Common Pitfalls:
Some candidates may mix up years and host countries, for example confusing the Argentine summit with a later Indian or Japanese summit. Others may guess None of the above if they do not recognise Argentina immediately. To avoid such mistakes, it is useful to link each G20 year with a clear mental image: 2018 with Buenos Aires in Argentina, 2019 with Osaka in Japan, and later years with their respective hosts. Simple mental associations of year, city, and country can greatly improve recall in the exam hall.

Final Answer:
The 13th G20 Summit held in 2018 took place in Argentina.