Match List I with List II.
| List-I | List-II |
| a. 10-7 | 1. pH value of neutral solution |
| b. > 7 | 2. pH value of acidic solution |
| c. < 7 | 3. pH value of alkaline solution |
| d. 7 | 4. In pure water hydrogen ion concentration |
A. a-1, b-4, c-3, d-2
B. a-2, b-1, c-4, d-3
C. a-3, b-2, c-1, d-4
D. a-4, b-3, c-2, d-1
Answer: Option D

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