Select the sentence which is correctly punctuated.

Question

1.A) He has a 150-pack-year smoking history.
B) He has a 150 pack year smoking history.

My answer is A.

2.A) The gangrene had spread to one-half of his leg.
B) The gangrene had spread to one half of his leg.

My answer is B.

3.A) He was one-half hour late.
B) He was one half hour late.

My answer is A.

4.A) She was flat-chested.
B) She was flat chested.

My answer is B.

5.A) This white female, gravida 32, para 4, is well-developed.
B) This white female, gravida 32, para 4, is well developed.

My answer is B.

Thanks!