Please help I am bad at this

The ph of carrots are 5.0 how it is classified a.acidic b.basic c.indicator d.neutral

Which of these conditions most likely produces an unstable isotope?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.