When a block of mass m is suspended separately by two different springs have time period `t_(1)" and "t_(2)`. If same mass is connected to parallel combination of both springs, then its time period is given by :-
A. `(t_(1)t_(2))/(t_(1)+t_(2))`
B. `(t_(1)t_(2))/(sqrt(t_(1)^(2)+t_(2)^(2)))`
C. `sqrt((t_(1)t_(2))/(t_(1)+t_(2)))`
D. `t_(1)+t_(2)`
