Choose the correct one-word substitute for:
'A speech or piece of writing that praises someone highly'.

Correct option is B

The correct one-word for the given group of words is (b) Encomium.
Explanation: An encomium is a formal speech or written piece that gives high praise to a person, idea, or achievement. It is used especially in literary or ceremonial contexts. (Hindi meaning: प्रशस्ति/उच्च प्रशंसा)
Example: The professor delivered an encomium in honour of the retiring principal.
Meanings of the given other options:
· (a) Elegy: a mournful poem/song for the dead (शोकगीत)
· (c) Sermon: a religious/moral talk, usually by a priest (धार्मिक उपदेश)
· (d) Soliloquy: a speech where a person talks to themselves (often in drama) (स्वगत भाषण)