Correct Answer & Explanation
Option C
The word 'ELUCIDATE' means to make something clear or explain it. 'Clarify' (স্পষ্ট করা, বিশদভাবে ব্যাখ্যা করা) is the most appropriate synonym. 'Obscure', 'Confuse', and 'Complicate' are antonyms, meaning to make something unclear or difficult to understand.