Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: Preterm newborns are born with lower vitamin D stores. Although vitamin D supplementation is recommended there is no consensus regarding the adequate dose of supplementation for preterm infants.


Options:
A: Inclusion Criteria:

* Preterm infants with gestational age 24 to 32 weeks who achieved at least 75% of total nutrition by enteral feedings in postnatal 2 weeks

Exclusion Criteria:

* perinatal asphyxia,
* major congenital or chromosomal anomalies,
* those with no expectation of survival in first 2 weeks
* those that total parenteral nutrition was not ceased by the first 2 weeks
B: Inclusion Criteria:

* Clinical diagnosis of stage 2-5 Chronic Kidney Disease (estimated glomerular filtration rate \[GFR\] between 15 and \< 90 ml/min/1.73m2) based on the new bedside Schwartz formula estimation using serum creatinine and height \[height in cm x 0.413/serum creatinine\]
* 1-21 years of age
* Willingness and ability to provide informed consent and assent

Exclusion Criteria:

* Children less than 1 year of age (in whom risk of vitamin D toxicity may be increased) or greater than 21 years at time of study screening
* Children with a documented history of hypercalcemia or nephrolithiasis
* Children with GI tract discontinuity (ostomy)
* Current pregnancy or pregnancy within the last 12 months
* Children with known anemia-related disorders including sickle cell anemia, thalassemia
* Children with severe 25D deficiency (\< 5 ng/mL) likely to be associated with severe morbidity and requiring prompt high dose vitamin D supplementation, or with 25D levels \> 60 ng/mL which could be associated with increased risk of vitamin D toxicity
C: Inclusion criteria:

1. 28 0/7-36 6/7 weeks gestational age (GA) at birth;
2. family identifies the child as black or African American;
3. \< 28 days of supplemental oxygen (subsequent oxygen therapy for \< 72 hrs for a brief subsequent illness or surgery will be allowed);
4. admitted to a participating site NICU, special care nursery, transitional care nursery, or well-baby nursery as a neonate; and
5. \< 40 weeks corrected GA at enrollment.

Exclusion criteria:

1. BPD (\> 28 days of supplemental oxygen);
2. pre-existing diagnosis of moderate to severe osteopenia of prematurity and/or alkaline phosphatase \> 700;
3. history of fracture;
4. gastrointestinal surgery, including for NEC;
5. known gastrointestinal malabsorption;
6. major congenital anomaly;
7. congenital pulmonary or airway disorder (e.g., cystic fibrosis, tracheomalacia, swallowing disorder, bronchopulmonary sequestration);
8. documented wheezing or stridor prior to enrollment;
9. previous vit. D supplementation with \> 400 IU/day;
10. family plans to move more than 60 miles from CWRU or other pre-defined radius at other sites;
11. baseline hypo- or hypercalcemia, hypo- or hyperphosphatemia; and
12. baseline 25(OH) D level \< 10 ng/ml.
D: Inclusion Criteria

* All the selected children of Severe uncomplicated acute malnutrition of concerned age group whose parents or guardians have give written consent for the study
* Mid Upper Arm Circumference (MUAC) less than 11.5 cm or Weight For Height (WFH) less then minus 3 standard deviation.

Exclusion Criteria

* Children above the concerned age group
* Refusal of parents for taking part in the study.
* Child having Severe Acute Malnutrition (SAM) with complications have loss of appetite, lower respiratory tract infection indicated by chest in drawing, severe vomiting.
* Temperature greater then 39°C or hypothermia less then 35°C, very pale, oedema, unconsciousness.

Answer: A