Genetic Disorders

Step 1: Understanding genetic disorders.
Genetic disorders are caused by abnormalities in the genes or chromosomes. Let's analyze the examples: - Colour blindness is a genetic disorder linked to the X chromosome.
- Albinism is a genetic disorder affecting the production of melanin in the body.
- Haemophilia is another genetic disorder, also linked to the X chromosome, affecting blood clotting.
- Malaria and Cholera are not genetic disorders; they are infectious diseases caused by pathogens, not genetic mutations.

Step 2: Analyzing the examples.
- P. Colour blindness and Malaria: Incorrect. Malaria is not a genetic disorder.
- Q. Albinism and Cholera: Incorrect. Cholera is not a genetic disorder.
- R. Haemophilia and Colour blindness: Correct. Both haemophilia and colour blindness are genetic disorders.
- S. Haemophilia and Albinism: Correct. Both haemophilia and albinism are genetic disorders.

Step 3: Conclusion.
The correct answer is (B) because both R and S quoted genetic disorders correctly. Final Answer: R and S.