Infantile amaurotic idiocy (Tay-Sachs disease) is

• A. The result of severe protein deficiency in diet and damages the muscle development in growing children
• B. An inherited disorder in which the spinal cord and brain are severely damaged within a few months of birth leading to paralysis and mental retardation, and finally the infant's death in 3 or 4 years
• C. A genetic abnormality which appears at the age of 25-30  years and damages the bones
• D. A chromosomal disorder in young children