Which of the following prevents collapsing of Trachea

Which of the following prevent collapsing of trachea?

Which of the following prevent collaspsing of trachea ?

Which of the following prevents the rupturing of lysosomal membrane :–

Which of the following preventive measures are adopted for storage of grains?

Which of the following are in direct contact with the AV valves and prevent these from collapsing back into atria ?

Which of the following are in direct contact with the AV valves and prevent these from collapsing back into atria ?

Which of the following is useful to prevent the action of thrombin?

What prevents collapsing of our trachea during breathing ?