Which statements is true about a spontaneous cell reaction in galvanic cell?

Which statement is true about spontaneous cell reaction in galvanic cell:

Which statement is always true for a spontaneous reaction?

Which statement is true in regard to a spontaneous redox reaction ?

Which of the followig statements about the spontaneous reaction occurring in a galvanic cell is always true?

Which of the followig statements about the spontaneous reaction occurring in a galvanic cell is always true?

Explain the redox reaction in galvanic cells.

Note down the reaction of Galvanic cell.