Where are Hassall's corpuscles found?

Select the correct statements regarding Thymus gland.
i. It is located in the upper part of thorax.
ii. It is made up of four lobes of lymphoid tissue.
iii. It is a prominent gland formed at birth and remains active throughout life.
iv. It is also called temporary gland.
v. It plays an important role in the development of immune system and provides humoral immunity.
In the light of above statements,choose the correct option from below.

The function of the thymus in $Homo$ $sapiens$ is primarily associated with which of the following?

Which of the following is $NOT$ associated with the thymus gland?

The thymus gland in mammals is primarily associated with which of the following?

Which gland gradually decreases in size with increasing age?