Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. Such problems include difficulty in implementing decisions, providing social security ot everyone and ensuring employment.
B. This is because almost all countries face problems related to their population.
C. The most crucial aspect of the problem is population pressure.
D. The population explosion is an important issue these days.

Correct option is C

Sentence D introduces the main topic of the paragraph, which is the issue of population explosion.
 Sentence B follows D and explains why this issue is important by stating that almost all countries face problems related to their population.
 Sentence A then follows B and provides examples of the problems faced by countries due to their population. This sentence logically follows sentence B, as it expands on the problems introduced in the previous sentence.
 Finally, sentence C concludes the paragraph by stating that the most crucial aspect of the problem is population pressure. This sentence logically follows sentence A, as it summarizes the main point of the paragraph.
 Therefore, the correct order of the sentences to form a meaningful and coherent paragraph is DBAC.