Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is?

Let x1(t) and x2(t) be periodic signals with fundamental periods T1 an

1.	Let x1(t) and x2(t) be periodic signals with fundamental periods T1 and T2 respectively. Then the fundamental period of x(t)=x1(t)+x2(t) is?
A.	LCM of T1 and T2
B.	HCF of T1and T2
C.	Product of T1 and T2
D.	Ratio of T1 to T2
Answer» B.