Question: Could you tell me if is there a way of donating money online?
Incorrect Answer: C
Correction: "Could you tell me if there is a way of donating money online?"
(Explanation: The word order after "if" should be subject + verb, not "is there".)

Question: James worked on his presentation on deforestation for two weeks but he hasn't completed it yet.
Incorrect Answer: B
Correction: "James has worked on his presentation on deforestation for two weeks, but he hasn't completed it yet."
(Explanation: Present perfect tense should be used when talking about actions that have relevance to the present. "Has worked" is the correct form.)

Question: Could you please let me know what are the fees for participating in the programme?
Incorrect Answer: C
Correction: "Could you please let me know what the fees are for participating in the programme?"
(Explanation: In indirect questions, the word order should follow the structure of a statement, not a question.)

Question: Both Ben and his dad is going on a guided tour of the castle.
Incorrect Answer: B
Correction: "Both Ben and his dad are going on a guided tour of the castle."