This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is not true about hydroquinone? 
Select and explain. 
A. It is a weak hypopigmenting agent, B. It inhibits tyrosinase, C. Response is incomplete and pigmentation may recur, D. It should not be used for melasma or chloasma of pregnancy
D: It should not be used for melasma or chloasma of pregnancy
Answer: D: It should not be used for melasma or chloasma of pregnancy 
Explanation: Ans. is'd'i.e., It should not be used for melasma or chloasma of pregnancy .Ref: KDT Vhle p. 8921Hydroquinone:It is a weak hypopigmentation agent.Inhibits tyrosinase and other melanin forming enzymes, decreases formation of and increases degradation of melanosomes.Regular application (as 2-6% lotion or cream) for months is required in melasma, chloasma of pregnancy, etc.