Plague is an infectious disease that is caused by the bacterium Yersinia pestis. Depending on the lung infection or sanitary conditions, plague can be spread in the air, by direct contact, or very rarely by contaminated undercooked food.

The Pendulum clock was invented by Christiaan Huygens. From its invention in 1656 until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use.Galileo Galilee discovered the phenomenon of Pendulum.

The mollusc composes the large phylum Mollusca of invertebrate animals. Around 85,000 extant species of molluscs are recognized. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Octopus is one of them.

The melting points of Boron, Calcium, Neon and Gold, respectively, are 2076⁰ C, 842⁰ C, - 248.6⁰ C, 1064⁰ C. Neon is the only gas given among the options and gases usually have very low melting points.

Nathu La pass is in India and it connects the Indian state of Sikkim with China's Tibet autonomous region. The pass is at 4310 metres above sea level. 

Pertussis, also known as whooping cough, is a highly contagious respiratory disease. It is caused by the bacterium Bordetella pertussis.

The Ten Degree Channel is a channel that separates the Andaman and Nicobar in the Bay of Bengal. This channel is 150 km wide.

Indian constitution had originally 22 parts. Although presently it has 25 parts, 448 articles and 12 schedules in total.

The Food and Agriculture Organization(FAO) of the United Nations is a specialised agencythat leads international efforts to defeat hunger. It is headquartered in Rome, Italy. Serving both developed and developing countries, FAO acts as a neutral forum where all nations meet as equals to negotiate agreements and debate policy.

Bryophyta are dominated by the gametophyte stage. Gametophyte refers to the gamete-producing and usually haploid phase in plant, when they produces the zygote from which the sporophyte arises. On the other hand- Bryophytes are an informal group consisting of three divisions of non-vascular land plants, the liverworts, hornworts and mosses. They are characteristically limited in size and prefer moist habitats although they can survive in drier environments.