The correct answer is B and C only.
Nonlinear arrows with barbs on one-stop are used to signify electron waft. A double-barbed arrow suggests the motion of an electron pair, while an unmarried-barbed arrow indicates the movement of an unmarried electron. A full head on the arrow indicates the movement or shift of an electron pair A partial head at the arrow indicates the shift of an unmarried electron.
The factor of the curved double-headed arrow is to expose the movement of an electron pair. They start on the tail and end up at the pinnacle. Arrows are universally acknowledged for indicating guidelines. they may be broadly used on signage and for wayfinding, and are frequently used in avenue surface markings. Upward arrows are frequently used to indicate a growth in a numerical fee and downward arrows suggest a decrease.
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