Answer: For calculate the time period we should be given length of bothe pendulums. But Here they have not given it. There is an error of the qutetion
Explanation
Time period of the simple pendulum can be denoted as T = 2*pi root (l/g) l is the length of the pendulum and g is the gravitational acceleration.
But we can suggest which pendulum has a higher time period considering theri inertia.