Who discovered the $C_4$ cycle?

$CAM$ helps the plants in

Observe the diagram and answer the following:
$(a)$ Which group of plants exhibit these two types of cells?
$(b)$ What is the first product of the $C_4$ cycle?
$(c)$ Which enzymes are present in bundle sheath cells and mesophyll cells?

In $C_4$ plants,the primary $CO_2$ acceptor is .........

$CAM$ plants are primarily........

Kranz anatomy is found in which of the following?