Which of the following best explains the rearrangement when provitamin D3 rearranges to vitamin D3? ![Which of the following best explains the rearrangement when provitamin D<sub>3</sub> rearranges to vitamin D<sub>3</sub>? A) [1,7] cycloaddition rearrangement,antarafacial B) [1,7] cycloaddition rearrangement,suprafacial C) [1,7] sigmatropic rearrangement,antarafacial D) [1,7] sigmatropic rearrangement,suprafacial E) [1,7] electrocyclic reaction,suprafacial](https://d2lvgg3v3hfg70.cloudfront.net/TB1831/11ea8a1c_2dc6_4f97_b657_a754f0480875_TB1831_00.jpg)
Definitions:
Social Smiles
Smiles that are expressed intentionally by infants, starting around the age of 6 to 8 weeks, in response to interactions with humans, indicating early social communication.
Attachment
A deep and enduring emotional bond that connects one person to another across time and space.
Birth
The act or process of bearing or bringing forth offspring from the womb.
Genetic Adaptation
The process through which populations become better suited to their environment over many generations, through the natural selection of beneficial genetic variations.
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