Option 1: (D), (C), (B), (A) -> Starts with "have been preserved" without a subject, making it grammatically incorrect.
Option 2: (C), (A), (D), (B) -> Begins with "by priests" which cannot start a sentence properly, and the sequence is illogical.
Option 3: (B), (D), (A), (C) -> "The ancient myths of India have been preserved with great care in the minds of people by priests-the guardians of learning" - forms a complete, meaningful sentence with proper subject-verb-object structure.
Option 4: (C), (B), (D), (A) -> Starting with "by priests" makes it a sentence fragment, lacking proper structure.
Hence, Option 3: (B), (D), (A), (C) -> This arrangement creates a grammatically correct sentence where "the ancient myths of India" is the subject, followed by the passive verb "have been preserved with great care," then the location "in the minds of people," and finally the agent "by priests-the guardians of learning" -> correct