The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counter is

The counter shown in the given figure is built using 4 -ve edge trigge

1.	The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counter is
A.	F = Q4 Q3 Q2 Q1
B.	F = Q4 + Q3 + Q2 + Q1
C.	F = Q4 + Q3 + Q2 + Q1
D.	F = Q4Q3Q2Q1
Answer» B. F = Q4 + Q3 + Q2 + Q1