Question: Zubin ƙwaƙwalwa yana ƙunshe da ƙwayoyin halitta, tantani, da gaɓoɓi. Wace ƙwayar halitta ce ta tsarin zubin ƙwaƙwalwa?
Options:
kwakwalwa
laka
ciwon ƙari
babban sashin ƙwaƙwalwa 
Answer: D