Which of the following statement relating to cystic fibrosis is/are correct?
A.	Cystic fibrosis is inherited as an X chromosome-linked recessive trait
B.	Cystic fibrosis is caused by a defective chloride channel
C.	Cystic fibrosis is caused by defective acetylcholine receptors
D.	Cystic fibrosis is inherited as an autosomal recessive trait
Answer:B
Which of the following statement relating to cystic fibrosis is/are correct?
A.	Cystic fibrosis is inherited as an X chromosome-linked recessive trait B.	Cystic fibrosis is caused by a defective chloride channel C.	Cystic fibrosis is caused by defective acetylcholine receptors D.	Cystic fibrosis is inherited as an autosomal recessive trait