A. Samra is going to say to the principal, "May we have your permission to go on a study tour?"
B. Samra is going to say to the principal, "Might we have your permission to go on a study tour?"
C. Samra is going to say to the principal, "Would we have your permission to go on a study tour?"
D. Samra is going to say to the principal, "Should we have your permission to go on a study tour?"
Explanation
The correct answer is: Samra is going to say to the principal, "May we have your permissi0on to go on a study tour?"
The indirect speech is: "Samra is going to ask the principal for permission to go on a study tour."
The direct speech is: "May we have your permission to go on a study tour?" (This is a polite and formal way of asking for permission, which is suitable for a student asking a principal.)