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Select the statement that is not true about Nicotine, the pharmacology active alkaloid found in tobacco.

(A) Nicotine is a stronger base than aniline (pK_a = 4.6 for the conjugate acid of aniline).

(B) In the blood buffered at pH = 7.4, nicotine exists primarily in the neutral form shown on the right rather than the cationic form shown on the left.

(C) When the pH of an aqueous solution of nicotine is adjusted to pH = 8.5 then the concentration of nicotine and its conjugate acid are equal.

(D) When the pH of an aqueous solution of nicotine is adjusted to pH = 1.0 then the conjugate acid of nicotine is the major species present.

(E) When the pH of an aqueous solution of nicotine is adjusted to pH = 14.0 then nicotine is the major species present.

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