Which sentence includes the correct punctuation?

Which sentence includes the correct punctuation?
 
  a. We were going to go to the beach but Fred talked us into going to the bay;
  b. We were going to go to the beach but Fred talked us into going to the bay?
  c. We were going to go to the beach but Fred talked us into going to the bay,
  d. We were going to go to the beach, but Fred talked us into going to the bay.

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Ques. 2

Which sentence includes the correct punctuation?
 
  a. We bought eggs milk and cheese.
  b. We bought, eggs, milk, and cheese.
  c. We bought eggs, milk, and cheese.
  d. We, bought eggs milk and cheese.

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Ques. 3

Which sentence includes the correct punctuation?
 
  a. I told you to get me the book not the magazine.
  b. I told you to get me the book not the magazine?
  c. I told you, to get me the book not the magazine.
  d. I told you to get me the book, not the magazine.

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Ques. 4

Which sentence includes the correct punctuation?
 
  a. This movie, which is very violent, is not appropriate for children.
  b. This movie which is very violent, is not appropriate for children.
  c. This movie, which is very violent is not appropriate for children.
  d. This, movie which is very violent, is not appropriate for children.

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Ques. 5

Which sentence includes the correct punctuation?
 
  a. Because you weren't home, I visited John.
  b. Because you weren't home, I visited John.
  c. Because you weren't home I visited John?
  d. Because you weren't home, I visited John,

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Ques. 6

Which sentence includes the correct punctuation?
 
  a. Is your sister an M.D.?
  b. Is your sister an MD.
  c. Is your sister an M.D.
  d. Is your sister an M.D.