English

Patna is the capital city of Bihar, Dispur is the capital city of Assam, and Bombay (now Mumbai) is the capital city of Maharashtra. The question asks to choose a similar word to these, which are all capital cities of Indian states. Among the options, Cochin (Kochi) is a city in Kerala but not the capital (Thiruvananthapuram is the capital), Trombay is an industrial area near Mumbai, Udaipur is a city in Rajasthan but not the capital (Jaipur is the capital), and Madras (now Chennai) is the capital city of Tamil Nadu. Therefore, the correct similar word is Madras (D), as it is a capital city like the others.

The pair 'Incandescent : Glowing' shows a relationship where the first word describes something that produces the second word's effect. 'Indefatigable : Untiring' similarly pairs a word with its synonym or closely related adjective, making it the correct analogous pair. Other options do not show this clear relationship.

Knot, Watt, and Fathom are all units of measurement: knot measures speed (nautical miles per hour), watt measures power, and fathom measures length (depth). This makes option D the correct answer.

Columbus, Magellan, and Vasco da Gama were all famous explorers and sailors known for their significant voyages during the Age of Discovery, making option B correct. They were not astronomers, nor were they the first to design ships, and their discoveries were not limited to Asian countries.

The pair 'Fond : Doting' shows a relationship where the first word describes a feeling or attitude, and the second word is a more intense or caring form of that feeling. 'Solicitous : Concern' similarly shows a relationship where 'solicitous' describes a caring attitude related to 'concern'. Other options do not show this analogous relationship as clearly.

Diamond, Sapphire, Ruby, and Emerald are all precious gemstones, so the word similar to the given set is Emerald.

A chain is made up of links, and a bridge connects two parts of land. Both 'link' and 'bridge' serve the function of joining or connecting parts, making option C the correct analogy.

Steel, Bronze, and Brass are all alloys, which are mixtures of metals. Magnalium is also an alloy (of magnesium and aluminum), making it the correct analogous choice. The other options are not alloys: Calcite is a mineral, Methane is a gas, and Zinc is a pure metal.

Gnu, Emu, and Curlew are all types of birds, making option B the correct analogy. The other options are factually incorrect as none of these are insects, pests, or specifically known for being fast runners.

Nissan, Toyota, and Isuzu are all well-known Japanese automobile manufacturers, making option C the correct analogy. The other options incorrectly categorize them as cities, ports, or television programs, which is factually incorrect.