The answer is D. Although there is no current universally accepted first-line treatment for trichotillomania, the glutamatergic agent, N-acetylcysteine (NAC), dosed at 1200 mg bid has been demonstrated to be helpful in reducing urges to hair pull. It is generally safe and well-tolerated. The most common side effects are flatulence and bloating. There is no strong evidence for the use of SSRIs in trichotillomania.

Publication reference : Grant J et al. Trichotillomania. AJP 2016. 173(9): 868-874.
Reference URL: https://www.ncbi.nlm.nih.gov/pubmed/?term=trichotillomania+american+journal+of+psychiatry+2016