How many statements from the following are correct?
$(a)$ In plants,phosphorylation occurs by three different ways.
$(b)$ Substrate level phosphorylation is a direct phosphorylation of $ADP$ by transfer of a phosphate group from any suitable substance.
$(c)$ Substrate level phosphorylation occurs in the cytoplasm of the cell only.
$(d)$ Oxidative phosphorylation occurs on the inner mitochondrial membrane only.

• A
  $(a)$,$(b)$ and $(c)$ only
• B
  $(b)$ and $(c)$ only
• C
  $(a)$ only
• D
  $(a)$,$(b)$ and $(d)$ only