Which statements are correct regarding centriole?

I: Centrioles are typically made up of nine sets of short microtubule triplets, arranged in a cylinder.
II: The main function of centrioles is to produce cilia during interphase and the aster and the spindle during cell division.
III:  Centrioles start duplicating when DNA replicates.
 
1. Only I and II 2. Only I and III
3. Only II and III 4. I, II and III
Subtopic:  Centrosomes |
From NCERT
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