Correct option is A
The correct order to form a meaningful and coherent paragraph is (a) BDCA.
Sentence B serves as an introductory statement. It talks about the likelihood of youngsters seeking advice from their elders, which sets the context for the paragraph.
Sentence D logically follows, as it continues the idea introduced in Sentence B by mentioning that elders are expected to give their advice as guidance.
Sentence C comes next, emphasizing the importance of the times and how the youth can systematically get their queries answered. This provides further context and detail to the situation mentioned in Sentence B.
Finally, Sentence A concludes the paragraph by explaining why this is the case. It mentions that the practical people in society boast of having a practical approach to life, which ties back to the behavior discussed in the earlier sentences.