Question 3 of the following statements, select the statement that is true regarding a NOR gate: The output of a NOR gate is true if and only if if there are all 'O's applied as inputs to it The output of a NOR gate is true if and only if if there are all'1's applied as inputs to it The output of a NOR gate is true if there is atleast one '1' applied as an input to it. The output of a NOR gate is true if there is atleast one 'O' applied as an input to it