TS EAMCET Medical 8 May 2019 Shift 2 Paper

Statement (S): In ciliates, conjugation restores the vigour and vitality which are lost due to chromosomal imbalance in the macronuclei due to repeated amitotic divisions.
Reason (R): C obligation is temporary union of senile ciliates belonging to same mating types. It often prevents exchange of nuclear material.
The correct answer is