<Tr> <Td> </Td> <Td> Continuous spectrum; no lines </Td> </Tr> <Tr> <Td> O </Td> <Td> He II lines, accompanied by He I or H lines </Td> </Tr> <Tr> <Td> Z </Td> <Td> Metal lines </Td> </Tr> <Tr> <Td> Q </Td> <Td> Carbon lines present </Td> </Tr>

Which of the following will never undergo fusion in any star