The correct option is A Apical cells
In meristem culture, the meristem of a plant can be cultured. Generally, the shoot apical meristem and nodes are used as explant. The are grown in CK rich medium. This hormone suppresses apical dominance resulting in the growth of lateral branches. If several branches arise from the explant, individual shoots are separated and cultured. If a single branch arises the nodal segments are separated and cultured. The meristem cultures produce virus-free clones. Besides the technique is also used to clonal propagation, production of transgenics and conservation of germplasm.