Medium
When a body falls in air,the resistance of air depends to a great extent on the shape of the body. $3$ different shapes are given in the figure: $(1)$ Disc,$(2)$ Ball,and $(3)$ Cigar-shaped. Identify the combination of air resistances $(R_1, R_2, R_3)$ which truly represents the physical situation. (The cross-sectional areas are the same).
- A$R_1 < R_2 < R_3$
- B$R_2 < R_3 < R_1$
- C$R_3 < R_2 < R_1$
- D$R_3 < R_1 < R_2$
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