Identify the correct statement for spirogyra, leishmania and hydra:

Spirogyra, Leishmania and Hydra use three very different modes of reproduction, but all three modes fall under asexual reproduction, i.e., a new generation is created from a single individual without the fusion of germ-cells from two parents.

• (A) 'they reproduce sexually' — incorrect. None of the three organisms mentioned use a sexual mode here; Spirogyra reproduces by fragmentation, Leishmania by binary fission, and Hydra by budding — all single-parent (asexual) processes as described in the NCERT chapter.
• (B) 'they are unicellular' — incorrect. Only Leishmania is unicellular (a single-celled organism with a whip-like structure that undergoes oriented binary fission). Spirogyra is a multicellular filamentous alga and Hydra is a multicellular animal, so 'unicellular' is not true for all three.
• (C) 'they are multicellular' — incorrect. Only Spirogyra and Hydra are multicellular; Leishmania is unicellular, so 'multicellular' does not hold for all three.
• (D) 'they reproduce asexually' — correct. The chapter explicitly places fragmentation (Spirogyra: 'Spirogyra, for example, simply breaks up into smaller pieces upon maturation'), binary fission (Leishmania: unicellular organism dividing by binary fission in a definite orientation) and budding (Hydra: 'a bud develops as an outgrowth... and detach from the parent body') together under the concluding statement: 'All the modes of reproduction that we have discussed so far allow new generations to be created from a single individual. This is known as asexual reproduction.' This is the one property common to all three organisms.