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Match List–I with List–II List – I (a) 10 km height over earth's surface (b) 70 km height over earth's surface (c) 180 km height over earth's surface (d) 270 km height over earth's surface List – II (i) Thermosphere (ii) Mesosphere (iii) Stratosphere (iv) Troposphere

1. (a)–(iv), (b)–(iii), (c)–(ii), (d)–(i)
2. (a)–(i), (b)–(iv), (c)–(iii), (d)–(ii)
3. (a)–(iii), (b)–(ii), (c)–(iv), (d)–(i)
4. (a)–(ii), (b)–(i), (c)–(iv), (d)–(iii)

Correct answer: (a)–(iv), (b)–(iii), (c)–(ii), (d)–(i)

Solution

Atmospheric layers in order of increasing altitude are troposphere (iv), stratosphere (iii), mesosphere (ii), thermosphere (i). Matching ascending heights (a)10 km -> (iv), (b)70 km -> (iii), (c)180 km -> (ii), (d)270 km -> (i).

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