Any disease involving your nervous system we take a sample of

The normal range for fasting blood sugar is between 70 and $100 \text{ mg/dl}$.
The correct option is A.

• 1. A

Detecting urine sugar is typically done as part of a general urinalysis, which involves chemical reagent strips.
The correct option is C.

• 2. C

Crystal detection is performed through the microscopic examination of a urine sample, which is part of a general urinalysis.
The correct option is B.

• 3. B

Jaundice is primarily caused by an excess of bilirubin in the blood, which results from the breakdown of red blood cells (hemolysis).
The correct option is C.

• 4. C

Trichomonas vaginalis is a parasite that infects the urogenital tract and is not typically found in stool samples. Ova (parasite eggs) and blood can be found in stool. Schistosoma Mansoni eggs are found in stool.
The correct option is C.

• 5. C

For diseases involving the nervous system, a sample of blood is often taken for various diagnostic tests, including biochemical markers, antibodies, and genetic analysis. Serum is a component derived from blood.
The correct option is A.

• 6. A