Rearrange the following four fragments (A), (B), (C), and (D) to construct a grammatically accurate and meaningful sentence. If the sentence is already correct, select 'No rearrangement required'.

one of the most effective of the (A) / Yoga is recognized as (B) / physical and mental well-being (C) / ancient disciplines for (D).

The correct option is BADC.

To construct a grammatically accurate and meaningful sentence, let's analyze the logical connection between the given fragments:

1. Fragment (B): "Yoga is recognized as"
This fragment introduces the subject ("Yoga") and verb phrase ("is recognized as"), making it the most natural opening for the sentence.

2. Fragment (A): "one of the most effective of the"
Following "recognized as", this fragment completes the predicate complement phrase, indicating that Yoga belongs to a category of top-tier disciplines.

3. Fragment (D): "ancient disciplines for"
This fragment specifies what category is being referred to ("ancient disciplines") and prepares for the purpose/benefit using the preposition "for".

4. Fragment (C): "physical and mental well-being"
This fragment acts as the object of the preposition "for", explaining the benefits provided by Yoga.

Combining these fragments in the sequence (B) → (A) → (D) → (C) gives the complete, coherent sentence:
"Yoga is recognized as one of the most effective of the ancient disciplines for physical and mental well-being."

Therefore, the correct arrangement is BADC.