Which is corretly identified alongwith its function

Identify A, B, C, D in the given diagram. Which of the following among these has been correctly identified along with its function ?

Which one of the following structure formulae of two organic compound is correctly identified along with its related function

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function

Given structural formula is correctly identified along with its related function by which of the following options ?

Given structural formula is correctly identified along with its related function by which of the following options ?

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function ?

Which one of the following structural formulae of two organic compounds is correctly identified along with its related function? .

Given structural formula is correctly identified along with its related function by which of the following options ?

Which one fo the following structuraal formulae of two orgainc compounds is correctly identified along with its related function ?