$T$-cells are lymphocytes which produce cellular immunity. These are developed from:

Which of the following is related to the production of lymphocytes and antibodies?

Which one of the following four glands is correctly matched with the accompanying description?

The thymus gland is a lobular structure located on the $A$ side of the aorta and plays a significant role in the development of the $B$ system.
Choose the correct combination of $A$ and $B$.

The location of the thymus is .........

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.