Question
The endosperm of gymnosperm is
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$(A)$ semiautonomous organelles
$(B)$ formed by division of preexisting organelles and they contain $DNA$ but lack protein synthesising machinery.
Which one of the following options is correct ?
| Column $I$ | Column $II$ |
| $(a)$ Potato spindle | $(i)$ Virus |
| $(b)$ Cr-Jacob disease $(CJD)$ | $(ii)$ Viroid |
| $(c)$ Cholera | $(iii)$ Prion |
| $(d)$ Leaf rolling and curling | $(iv)$ Bacteria |