Pick up the correct equation from the following:
(A) Run off = Surface run off + Ground water flow
(B) Run off = Surface run off - Ground water flow
(C) Run off = Surface run off / Ground water flow
(D) Run off = Surface run off x Ground water flow
(A) Run off = Surface run off + Ground water flow
(B) Run off = Surface run off - Ground water flow
(C) Run off = Surface run off / Ground water flow
(D) Run off = Surface run off x Ground water flow