Increasing order of reactivity of the following compounds for SN1 substitution is:(1) (2) (3) (4)

• A. (2) < (3) < (4) < (1)
• B. (2) < (3) < (1) < (4)
• C. (2) < (1) < (4) < (3)
• D. (1) < (2) < (4) < (3)