Find the incorrect statement (s) about photosynthesis from the following :
A. The water splitting complex is associated with PS I.
B. \(C _4\) plants use the \(C _3\) pathway of \(CO _2\) fixation as the main biosynthetic pathway.
C. In \(C _4\) plants, photorespiration does not occur.
D. \(C _3\) plants exhibit 'Kranz' anatomy.
E. ATP synthesis in chloroplast occurs through chemiosmosis.
Choose the answer from the options given below :

(D) A and D only
Statement A is incorrect because the water splitting complex is associated with PS II, not PS I.
Statement B is correct because the Calvin cycle ( \(C _3\) pathway) is the main biosynthetic pathway for all plants, including \(C _4\) plants.
Statement C is correct because \(C _4\) plants have a mechanism that increases the concentration of \(CO _2\) at the enzyme site, preventing RuBisCO from acting as an oxygenase, thus avoiding photorespiration.
Statement D is incorrect because Kranz anatomy is a characteristic feature of \(C _{ 4 }\) plants, not \(C _3\) plants.
Statement E is correct because ATP synthesis in chloroplasts is explained by the chemiosmotic hypothesis.
Therefore, the incorrect statements are A and D.