Assertion: In animals, mitotic cell division is only seen in the haploid somatic cells.
Reason: The plants can show mitotic divisions in both haploid and diploid cells.

Assertion (A) is false and Reason (R) is true.

The correct answer is Option (4)- Assertion (A) is false and Reason (R) is true.

Some cells in the adult animals do not appear to exhibit division (e.g., heart cells) and many other cells divide only occasionally, as needed to replace cells that have been lost because of injury or cell death. These cells that do not divide further exit G1 phase to enter an inactive stage called quiescent stage  (G₀)of the cell cycle. Cells in this stage remain metabolically active but no longer proliferate unless called on to do so depending on the requirement of the organism. In animals, mitotic cell division is only seen in the diploid somatic cells. However, there are few exceptions to this where haploid cells divide by mitosis, for example, male honey bees. Against this, the plants can show mitotic divisions in both haploid and diploid cells. From your recollection of examples of alternation of generations in plants identify plant species and stages at which mitosis is seen in haploid cells.