Select the most appropriate segment to substitute the underlined words in the given sentence.
The referee declared that the participant who will score the highest points in the tally will take away the cash prize of ₹50 lakh.

The correct answer is who scores the highest point.

Explanation:
1. Grammatical Tense: In relative clauses or subordinate clauses referring to a future action linked with a main clause expressing a future outcome ("will take away..."), the simple present tense (scores) is used instead of the future simple tense (will score).
2. Correction: Replacing the redundant future tense "who will score" with the simple present tense "who scores" makes the clause grammatically accurate.
3. Therefore, "who scores the highest point" is the most appropriate segment to substitute the underlined phrase.