The oval and spherical bodies present in thymus that act as a phagocytes and provide immunity to the body. These bodies are
Zona glomerulosa
Hassall's corpuscles
Intestinal bodies
Zona fasciculata
Thymus gland is derived from the endoderm and is a lobular structure located between the lungs behind the sternum on the ventral side of the aorta which plays a major role in the development of the immune system. It has some corpuscles that act as phagocytes.
Hassall's corpuscles (macrophages) are spherical and oval bodies present in the thymus that are phagocytic in function. Hence, option 2 is the correct answer.