In an elevator, a spring clock of time period `T_(s) ` (mass attached to a spring) and a pendulum clock of time period `T_(p)` are kept. If the elevator accelerates upwards

The time period of a pendulum clock is :

A pendulum suspended from the roof of an elevator at rest has a time period T_(1) , when the elevatore moves up with an acceleration a its time period becomes T_(2) , when the elevator moves down with an acceleration a , its time period becomes T_(3) , then

The graph between period of oscillation (T) and mass attached (m) to a spring will be