In the following question, a sentence has been given in direct speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in indirect speech.

Pritha said to me, "We have to win this trophy".

Changing from direct speech to indirect speech involves:

1. The removal of quotation marks (and the comma that precedes it, which gets replaced by the word 'that').
2. A potential change in the tense of the sentence, changing 'said to' to 'told'.
3. A change in pronouns according to the context.
4. Adjustment in the expressions that define time and place.

Using these principles, the sentence $$\rightarrow$$ Pritha said to me, "We have to win this trophy" will be changed to $$\rightarrow$$ Pritha told me that we have to win that trophy.

The noun phrase 'this trophy' in direct speech will be transformed to 'that trophy'. 'We' is an inclusive pronoun that includes both Pritha and the speaker, and will remain unchanged. Option C is the correct answer.

Option A disregards the inclusive 'we' and is incorrect. Option B changes the tense of the quoted modal verb 'have' which should remain unchanged; and is also incorrect. Option D makes the errors made in both options A and B and is incorrect.