गर्भावस्था के 28 सप्ताह से लेकर 32 सप्ताह से कम के बीच होने वाले समयपूर्व जन्म (preterm birth) को आमतौर पर किस रूप में वर्गीकृत किया जाता है?

Which of the following is a primary cause of physiological jaundice in a newborn?

A 9-month-old infant presents with sudden colicky abdominal pain, bilious vomiting, and drawing up of legs. A sausage-shaped mass is palpated in the right upper quadrant, and stool contains mucus and blood ('current jelly' stool). What is the most appropriate initial management for this condition?