FIA

International Peace Day, also known as the International Day of Peace, is observed annually on 21 September to promote peace among nations and peoples worldwide.

International World Environment Day is officially observed on 5th June every year to raise awareness about environmental issues globally.

Venus is the brightest planet visible from Earth due to its thick, reflective cloud cover and proximity to Earth, making it the most visible planet in the night sky.

The series is a geometric series with first term a = 1 and common ratio r = 1/3. The sum of an infinite geometric series with |r| < 1 is a / (1 - r) = 1 / (1 - 1/3) = 1 / (2/3) = 3/2 = 1.5.

Ashraf Ghani officially became the President of Afghanistan on 30 September 2014, following the 2014 presidential election and a power-sharing agreement. Therefore, option B is correct.

"Elucidate" means to make something clear or explain, which is not a synonym of "Investigate." "Examine" and "Scrutinize" both mean to inspect or investigate carefully, making them synonyms. "None of these" is incorrect because option C is not a synonym.

In the 1970 general elections of Pakistan, the main political parties were the Awami League and the Pakistan Peoples Party (PPP). These two parties dominated the political landscape during that election.

President Donald Trump and North Korean leader Kim Jong-un met in Singapore in June 2018 for their historic summit, making Singapore the correct answer.

International Forest Day, officially known as the International Day of Forests, is celebrated annually on 21st March. This date was established by the United Nations General Assembly in 2012 and first observed in 2013. The day aims to raise awareness about the importance of all types of forests and trees for the benefit of current and future generations. Multiple authoritative sources including the United Nations, FAO, and Wikipedia confirm the date as 21 March, making option A the correct answer.

The Great Spot, more commonly known as the Great Red Spot, is a giant storm on Jupiter. It is a persistent high-pressure region producing an anticyclonic storm, making option B (Storm) the correct answer.