Which of the following is the correct order of decreasing `S_(N^(2))` reactivity ?
Which of the following is the correct order of decreasing `S_(N^(2))` reactivity ?
A. `R-CH_(2)-X gt R_(3)CX gt R_(2)CHX`
B. `R-CH_(2)X gt R_(2)CHX gt R_(3)CX`
C. `R_(3)CX gt R_(2)CHX gt R-CH_(2)X`
D. `R_(2)CHX gt R_(3)CX gt R-CH_(2)X`
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