MCQ
Find odd one w.r.t. differentiation
- ALoss of nucleus in sieve
- BDeath of protoplasm in tracheary elements
- ✓Callus formation
- DLignification in vessels
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Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

| Column $-I$ | Column $-II$ |
| $(A)$ Family | $(i)$ Diptera |
| $(B)$ Order | $(ii)$ Arthopoda |
| $(C)$ Class | $(iii)$ Muscidae |
| $(D)$ Phylum | $(iv)$ Insecta |