You are right. The B answer is correct. Nominative case is called for.

First, you are correct. These are all subjects and must therefore be in the nominative case, so D is wrong. Next, we almost never start multiple subjects with "I" (except in a pejorative sense, I've just learned), so C is out. Now, I would actually prefer, like Peachey above, to say "she, you and I," (A), but I found the following on page 63 at http://www.distanceeducationju.in/pdf/B.A.%20Part%201%20Eng.%20B%202008-09-New%20Setup.pdf : "When there are pronouns of different persons, second person [you] should come first, third person [she/he/they] next and first person [I/we] last, unless used in pejorative sense, when the order is reversed." This was the only reference I could find, and I have never heard (or probably used) that rule in my life, but at least it does appear to come from somewhere, so the answer to your question would be (apparently) B. As for that part about the "pejorative sense," I understand it to mean a sentence formed with a negative intent. So if I said, "We are terrible at speaking Spanish" but wanted to use individual pronouns, according to this rule, I should say, "I, she and you are terrible at speaking Spanish" as opposed to "You, she and I are wonderful at speaking Spanish."

Using "me" in this position is a common mistake in English. You're right, you need the subject pronoun, otherwise the sentence breaks down into "me will spend the summer holiday in Hawaii" and "her will spend the summer holiday in Hawaii." Her what? That's so poor it's comical. "I" should come at the end of the group of people, but I'm not sure about the order of "you" and "she". I'd prefer "she, you and I" (A) to follow a least-familiar to most-familiar pattern, but does the writer put "you" first because it's a direct address? I'd love some thoughts on this as well.