Which of the following is correct statement in so far as section 20 of the Code of Civil Procedure, 1908, is concerned?

The suit has to be instituted in the court of the lowest grade competent to try it

The suit has to be instituted in the court within the local limits of whose jurisdiction the defendant actually and voluntarily resides or carries on business or personally works for gain

The suit has to be instituted in the court within the local limits of whose jurisdiction, the cause of action wholly or in part arises