The first Public Bicycle Sharing (PBS) system in India was launched in 2017 in Mysuru.

A team of four Indian Army personnel successfully climbed Mt Everest without using oxygen cylinders.

Whereas oxygen, nitrogen, and argon are not examples of greenhouse gases.

Cholera, caused by the bacterium Vibrio cholerae, can be both epidemic and endemic. Epidemic cholera refers to sudden outbreaks affecting large populations, often due to contaminated water. Endemic cholera signifies the continuous, stable presence of the disease in specific regions, indicating a persistent, albeit lower, level of infection over time.

Certain plants, like gymnosperms, produce seeds but lack fruits. Gymnosperms, including pine trees and cycads, have exposed seeds on cone scales, distinguishing them from angiosperms, which produce seeds enclosed within fruits. The absence of a fruit covering the seed is a characteristic feature of gymnosperms, a group of seed-producing plants.

The plants that never produce flowers are called "cryptogams." Cryptogams include plants such as ferns, mosses, liverworts, and algae. Unlike flowering plants (angiosperms), which reproduce through seeds enclosed within flowers, cryptogams reproduce through spores and do not produce true flowers. Cryptogams are considered more primitive in evolutionary terms compared to angiosperms, which are the most dominant group of plants on Earth today.

Calcium is the element that is present in both cement and bones. In cement, calcium is a key component of calcium silicate compounds, which contribute to the strength and durability of the material. In bones, calcium is a vital mineral that provides structural support and strength. It plays a crucial role in various physiological processes in the human body, including muscle function and nerve signaling.

Vitamin D is often referred to as the "sunshine vitamin" because our bodies can produce it in response to sunlight exposure. When our skin is exposed to sunlight, it synthesizes vitamin D, which is important for bone health and various other bodily functions.