Given below are two statements : Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes. In the light of above statements, choose the most appropriate answer from the options given below :

• A

  Both Statement I and Statement II are incorrect.
• B

  Statement I is correct but Statement II is incorrect.
• C

  Statement I is incorrect but Statement II is correct.
• Correct answer
  D

  Both Statement I and Statement II are correct.

Hence, the correct answer is option: 'D'.