In photosynthesis, which phase involves the following phenomena?
$(I)$ Water is split $(photolysis)$
$(II)$ Oxygen is liberated
$(III)$ $NADPH$ is formed

• A
  $I$ and $II$ in photochemical phase while $III$ in biosynthetic phase
• B
  $I$ in photochemical phase while $II$ and $III$ in biosynthetic phase
• C
  $I, II,$ and $III$ in photochemical phase
• D
  $I, II,$ and $III$ in biosynthetic phase