Example for autosomal recessive inheritance:

Correct option is B

Ans. (b)
Sol. Cystic fibrosis is an autosomal recessive genetic disorder, meaning a child must inherit two defective copies of the gene (one from each parent) to manifest the disease.
Explanation of each option:
· (a) Hemophilia – X-linked recessive, not autosomal.
· (b) Cystic fibrosis – Correct. Classic autosomal recessive disorder.
· (c) Craniofacial disorders – Can be multifactorial or dominant, not strictly recessive.
· (d) Skeletal disorders – Often autosomal dominant or multifactorial.