Which one of the following is not a correct pair

Which one of the following is not correct pairing of the structure with function?

Which one of the following is the correct pairing of the site of action and the substrate of rennin.

Which one of the following is a correct pair showing the function of a specific part of the human nephron?

Which one of the following is a correct pair with respect to molecular formula of xenon compound and hybridisation state of xenon in it ?

Which one of the following is a correct pair with respect to molecular formula of xenon compound and hybridisation state of xenon in it?

Which one of the following is a correct pair to list the necessary properties of a medium for the propagation of wave ?

Which one of the following is the correct pair with respect to molecular formula of xenon compound and hybridization state of xenon in it?