The user provided an image with text that seems to be a programming quiz question. I need to extract the question and the available options to answer it.

Question:

What will be displayed in the console as a result of executing the following program?

• delegate void Message();
• void Hello() { Console.WriteLine("Hello"); }
• void Hi() { Console.WriteLine("Hi"); }
• Message mes = new Message(Hello);
• mes += Hi;
• mes -- Hello;
• mes -= Hi;
• mes();

Options:

• Hello
• Hi
• Hello Hi
• Hi Hello

Explanation:

1. The code defines a delegate `Message` and two methods, `Hello` and `Hi`, which print "Hello" and "Hi" respectively.
2. A new instance of the delegate `mes` is created, initially pointing to the `Hello` method.
3. mes += Hi; adds the `Hi` method to the delegate. Now `mes` points to both `Hello` and `Hi`.
4. mes -- Hello; removes the `Hello` method from the delegate. Now `mes` only points to `Hi`.
5. mes -= Hi; removes the `Hi` method from the delegate. The delegate becomes empty.
6. mes(); is called. Since the delegate is empty, nothing will be printed to the console.

Note: The provided image only shows the option "Hello". Assuming other options would follow, the correct behavior based on the code is that nothing will be printed. However, if the question implies only one method is ever assigned, the interpretation might change. Given the typical behavior of delegates in C#, the sequence of operations leads to an empty delegate.

Therefore, if the options were to include an output like "Hello Hi" or "Hi Hello", that would be incorrect based on the `mes -= Hi;` operation. If the delegate is empty, no output is expected. If the `mes -= Hi;` line was absent, it would print "Hello Hi". If `mes -- Hello;` was absent and `mes += Hi` was present, it would print "Hello Hi". If `mes -- Hello;` was present and `mes -= Hi;` was absent, it would print "Hi". Since both removal operations are present, the delegate becomes empty.

Based on the visible options in the image, and the typical behavior of delegates, the most likely scenario is that none of the options represent the correct output if the code is executed as written (resulting in no output). However, if we consider potential variations or simpler interpretations where the last added method is executed, then "Hi" would be printed. Given the visible option is "Hello", and it's the first method added, it's unlikely to be the final output after removals.

Assuming the question intends to test the understanding of delegate invocation after additions and removals:

Initial: `mes = Hello`

After `mes += Hi`: `mes = Hello, Hi`

After `mes -- Hello`: `mes = Hi`

After `mes -= Hi`: `mes =` (empty)

Therefore, `mes()` will execute nothing.

Since "Hello" is an option, and it's the first method assigned, it's possible the question or options are flawed, or there's a misunderstanding of the context. However, strictly following the code: NO OUTPUT.

Given the visual limitation, I can only confirm the question and the first visible option: "Hello". Without other options, I cannot definitively select an answer from the image alone. The code execution clearly leads to no output.