Discussion

Match List-I and List-II and select the correct answer by using the codes given below :

List I	List II
(a) Isohypse	(1) Equal cloudiness
(b) Isohel	(2) Equal height and pressure lines
(c) Isocrymes	(3) Equal sunshine
(d) Isonephs	(4) Equal frost

Codes : (a) (b) (c) (d)

Answer: D

The correct matching is (2) (3) (4) (1).

An isohypse joins points of equal height; on upper-air charts it joins points where a pressure level lies at the same height, hence 'equal height and pressure lines'.
An isohel joins places with equal sunshine (Greek helios, sun).
An isocryme joins places with equal frost, or the same lowest mean temperature (Greek kryos, cold).
An isoneph joins places with equal cloudiness (Greek nephos, cloud).

Option A pairs isohypse with cloudiness, and options B and C reverse other pairs.

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