The Agni missile is a family of medium to intercontinental range ballistic missiles developed by India, with the first test firing taking place in 1989.

In 2005, China's rapid economic growth was accompanied by challenges related to its large population 1. Resource management, environmental sustainability, and social equity were areas of concern.

In 2008, the 15th SAARC Summit was held in Colombo, Sri Lanka. Consequently, the Chairperson of SAARC for that period would have been the then President of Sri Lanka, Mahinda Rajapaksa [2, p3]. Sushil Koirala became Prime Minister of Nepal and chaired SAARC much later, in 2014. As Mahinda Rajapaksa is not listed, and the premise of Sushil Koirala chairing SAARC in 2008 is incorrect, "None of these" is the accurate answer for a 2008 paper. The PDF's answer (b) based on Koirala is anachronistic.

In 2008, Canada was the world's largest producer of uranium [2, p2]. It was followed by Kazakhstan and Australia. Kazakhstan subsequently surpassed Canada to become the leading global uranium producer in 2009. The PDF's listed answer was (d), but its own explanation supports Canada being the largest in 2008.

Around 2008, the United States was Pakistan's largest export partner [2, p1]. The U.S. market has traditionally been a major destination for Pakistani goods, especially textiles, apparel, and other manufactured items.

The Thar Coal Authority was established in 2008 to oversee and manage coal mining and energy generation projects in the Thar region of Sindh, Pakistan.

The United States signed the CTBT in 1996 but has not ratified it. Ratification requires Senate approval, which has not been granted.

The International Day for the Elimination of Racial Discrimination is observed every year on 21 March. This date commemorates the Sharpeville massacre in South Africa in 1960, when police killed 69 people at a peaceful protest against apartheid. The United Nations General Assembly proclaimed the day in 1966, urging the international community to intensify efforts to eliminate all forms of racial discrimination.

China has led the world in Internet users since 2008, with over 700 million people online by 2014. Its massive user base has driven the growth of domestic tech giants and shaped global digital trends.

The Pacific Ocean reaches its greatest depth in the Mariana Trench—about 10,920 meters below sea level—making it the deepest of the world’s oceans and covering more than 63 million square miles.