Which of the following is the staggered conformation for rotation about the C1-C2 bond in the following structure? 
Definitions:
Endocrine Gland
A gland that secretes hormones directly into the bloodstream to regulate various body functions.
Hypothalamus
A region of the brain that regulates various bodily functions, including temperature, thirst, hunger, and the release of hormones from the pituitary gland.
Calcium Levels
The concentration of calcium ions in a particular system, important in biological contexts for bone formation and neuromuscular function.
Endocrine Gland
A gland that secretes hormones directly into the blood rather than through a duct, affecting various bodily functions.
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