On May 18, 1974, India conducted its first successful nuclear test at the Pokhran Test Range in Rajasthan. The project was officially designated as 'Smiling Buddha'. This historic event marked India's entry into the group of nations possessing nuclear capabilities, and it was conducted for peaceful research purposes according to the Indian government's official statements at the time.

The Partial Test Ban Treaty (PTBT), which prohibited nuclear weapons tests in the atmosphere, in outer space, and under water, was signed in Moscow on August 5, 1963. It was a major diplomatic achievement between the United States, the Soviet Union, and the United Kingdom, aimed at curbing the environmental and health risks associated with radioactive fallout from nuclear testing.

Sound is a mechanical wave that requires a medium to propagate. Its speed is determined by the density and elasticity of the medium. Generally, sound travels fastest in solids because the particles are more tightly packed and have stronger intermolecular forces than in liquids or gases. Among the choices provided, glass is a dense solid that facilitates faster sound transmission compared to water or air.

Ultrasonic waves are sound waves that possess frequencies higher than the upper limit of human hearing, which is typically 20,000 Hz (20 kHz). Because these frequencies are beyond the audible range, they are referred to as 'ultrasonic.' They are widely used in various applications, including medical imaging, industrial cleaning, and non-destructive testing of materials.

Hookworm larvae, specifically those of Ancylostoma duodenale or Necator americanus, are commonly found in contaminated soil. They possess the ability to penetrate intact human skin, often entering through the soles of the feet when a person walks barefoot. Once inside, they migrate through the bloodstream to the lungs and eventually the small intestine to mature.

Insects are the most diverse and numerous group of animals on Earth and represent the most significant threat to global agriculture. They cause extensive damage by feeding on plant tissues, transmitting diseases, and destroying stored grains. Due to their rapid reproductive cycles and ability to adapt to various environments, they consistently cause more aggregate economic and physical damage to crops than rodents or birds.

The Peregrine Falcon is widely recognized by biologists as the fastest member of the animal kingdom. When performing its characteristic hunting maneuver, known as a stoop or high-speed dive, the falcon tucks its wings and enters a streamlined shape, allowing it to reach speeds exceeding 200 miles per hour (320 km/h). This incredible velocity makes it an exceptionally efficient aerial predator.

The cheetah is widely acknowledged as the fastest land animal, capable of reaching speeds between 60 and 70 miles per hour in short bursts covering distances up to 1,500 feet. Its body is uniquely adapted for high-speed hunting, featuring a flexible spine, semi-retractable claws for traction, and a long tail for balance during sharp turns while chasing prey across the savanna.

Light is the fastest entity in the universe, traveling at a constant speed in a vacuum. This speed is approximately 186,000 miles per second, which is equivalent to about 300,000 kilometers per second. This fundamental physical constant is essential for understanding the scale of the universe and the principles of modern physics, including relativity.

Visible light is composed of a spectrum of colors, each corresponding to a specific range of wavelengths. Within the visible spectrum, red light has the lowest frequency and the longest wavelength, typically ranging from about 620 to 750 nanometers. Conversely, violet light has the shortest wavelength. Therefore, red light is at the long-wavelength end of the visible spectrum.