Explanation:

A team of Australian researchers have identified a biochemical marker in the blood that could help identify newborn babies at risk for sudden infant death syndrome (SIDS).

• Sudden infant death syndrome (SIDS) is the unexplained death, usually during sleep, of a seemingly healthy baby less than a year old. SIDS is sometimes known as crib death because the infants often die in their cribs.
• In their study, babies who died of SIDS had lower levels of an enzyme called butyrylcholinesterase (BChE) shortly after birth, the researchers said.
• BChE plays a major role in the brain’s arousal pathway, and low levels would reduce a sleeping infant’s ability to wake up or respond to its environment.

Hence both statements are correct.