Amjad Hussain Sial from Pakistan served as the Secretary-General of SAARC (South Asian Association for Regional Cooperation). SAARC is a regional organization that promotes economic and cultural cooperation among South Asian countries. The Secretary-General is responsible for coordinating activities, implementing decisions, and facilitating cooperation among member states. The position rotates among member countries. Antonio Guterres is the UN Secretary-General, not SAARC. Ajay Bisaria is an Indian diplomat, and Arjun Bahadur Thapa is a former SAARC Secretary-General. Thus, Amjad Hussain Sial is the correct answer in this context, reflecting leadership within regional cooperation frameworks.

Karakoram Highway length is about 1600 km connecting Pakistan and China.

Kurt Waldheim served as the fourth Secretary-General of the United Nations from 1972 to 1981. The Secretary-General is the chief administrative officer of the UN and plays a key role in international diplomacy. Waldheim’s tenure focused on global peace efforts and conflict resolution during the Cold War period. His role involved mediating disputes and representing the UN on international platforms. Thus, he is ranked as the 4th Secretary-General, making option D correct.

Dengue fever is caused by the dengue virus, which is transmitted primarily by the Aedes aegypti mosquito. This mosquito is active during the daytime and breeds in stagnant water. Aedes aegypti is known for its distinctive black and white markings and is commonly found in tropical and subtropical regions. It spreads dengue, chikungunya, and Zika virus. Anopheles mosquitoes transmit malaria, while Culex species transmit diseases like filariasis and West Nile virus. Thus, Aedes aegypti is the correct answer. Preventing mosquito breeding and avoiding bites are key measures to control dengue انتشار.

Max Planck, a German physicist, is known as the father of quantum theory. In 1900, he proposed that energy is emitted in discrete packets called quanta, rather than continuously. This idea explained blackbody radiation, which classical physics could not. Quantum theory revolutionized physics and led to the development of quantum mechanics. It explains the behavior of particles at atomic and subatomic levels and forms the basis of modern technologies like semiconductors and lasers. Gravitational theory is associated with Isaac Newton, while the theory of relativity was developed by Albert Einstein. “Quality theory” is not a scientific concept. Thus, the correct answer is quantum theory. Planck’s work marked the beginning of modern physics.