Which combination of statements is incorrect? |
i. All substances are either acidic or basic. |
ii. Lime water turns red litmus blue. |
iii. Common salt dissolved in water turns blue litmus red. |
iv. Phenolphthalein is a natural indicator. |
v. Calamine can be used to treat ant's sting. |
A) i, ii, iii and iv
B) i, iii and iv
C) i, ii and iv
D) ii, iii and iv
E) None of these
Correct Answer: B
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