Allergies could be because of

1.    Protected environment provided in early life

2.    Modern day lifestyle

3.   More sensitivity to the environment

4.   All of these

The cause of autoimmunity can be

The primary lymphoid organs are

Which of the following is not a lymphoid organ?

1.    Appendix

2.    Thyroid

3.   Peyer's patches

4.   Tonsils

The formation of effector lymphocytes will occur in

1.    Bone marrow

2.    Thymus

3.   Appendix

4.   Thyroid

What is the main lymphoid organ where all blood cells including lymphocytes are produced?

1.    Spleen

2.    Thymus

3.   Lymph nodes

4.   Bone marrow

The microenvironment  for the maturation and development of T lymphocytes is created by

1.    Bone marrow

2.    Thymus

3.   Both A and B

4.   Spleen

The immature lymphocytes differentiate into antigen sensitive lymphocytes in

1.    Bone marrow

2.    Thymus

3.   Both A and B

4.   Spleen

The site of interaction of lymphocyte with antigen is

1. Bone Marrow

2. Thymus

3. Both 1 and 2

4. Lymph nodes

Thymus is not