**Core Concept**
The underlying principle being tested is the calculation of daily fluid requirements for preterm neonates, which is crucial for maintaining proper hydration and electrolyte balance. This calculation is often based on the neonate's weight. In neonatology, **fluid therapy** is tailored to meet the specific needs of preterm infants, considering their higher surface area to volume ratio and immature renal function.

**Why the Correct Answer is Right**
For preterm neonates, especially those with very low birth weights like 1100g, fluid requirements are carefully calculated to prevent both dehydration and fluid overload. The general approach is to start with a baseline fluid requirement that is then adjusted based on the infant's urine output, weight changes, and serum electrolyte levels. The **fluid requirement** for preterm neonates typically ranges from 80 to 100 mL/kg/day for those weighing less than 1200g, increasing with weight and gestational age.

**Why Each Wrong Option is Incorrect**
**Option A:** This option would be incorrect because it underestimates the fluid needs for a preterm neonate of 1100g.
**Option B:** Similarly, this would not provide sufficient fluids for the daily needs of such a small neonate.
**Option D:** This option overestimates the fluid requirement, potentially leading to fluid overload.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that preterm neonates have higher insensible water losses due to their larger surface area to volume ratio, necessitating careful management of their fluid status. Monitoring of daily weights, intake, and output is crucial in these patients.

**Correct Answer:** Correct Answer: C. 80-100 mL/kg/day.