A 1-month-old boy presents with failure to thrive. On examination, he shows features of congestive heart failure. The femoral pulses are feeble as compared to the brachial pulses. The most likely clinical diagn osis is:

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?