**Core Concept**
Halba disease is a rare genetic disorder characterized by the accumulation of mucopolysaccharides in various tissues due to a deficiency of the enzyme alpha-L-iduronidase. This enzyme is essential for the breakdown of mucopolysaccharides, leading to their accumulation and subsequent tissue damage.

**Why the Correct Answer is Right**
The deficiency of alpha-L-iduronidase results in the accumulation of mucopolysaccharides, such as dermatan sulfate and heparan sulfate, in various tissues including the liver, spleen, and bone marrow. This accumulation leads to tissue damage and the characteristic clinical features of the disease, including clouded corneas, hepatosplenomegaly, and skeletal abnormalities. The enzyme deficiency is inherited in an autosomal recessive pattern, meaning that an individual must inherit two defective copies of the gene (one from each parent) to express the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Halba disease is not caused by a deficiency of alpha-D-glucosidase, which is the enzyme deficient in Pompe disease.
**Option B:** This option is incorrect because Gaucher disease is caused by a deficiency of glucocerebrosidase, not alpha-L-iduronidase.
**Option C:** This option is incorrect because Hurler syndrome is caused by a deficiency of alpha-L-iduronidase, but it is not the same as Halba disease.

**Clinical Pearl / High-Yield Fact**
Halba disease is a rare genetic disorder that results from the accumulation of mucopolysaccharides in various tissues due to a deficiency of the enzyme alpha-L-iduronidase. It is essential to recognize the characteristic clinical features and enzyme deficiency associated with this disease to differentiate it from other mucopolysaccharidoses.

**Correct Answer: D.**