Which type of nonthreaded couplings have two hook-like lugs on each coupling?

Organogenesis is the process of organ formation

Indicate whether the statement is true or false

Corticosteroids are the drugs of choice for the treatment of all the following except:

a. Pemphigus b. Pemphigoid c. Erythema multiforme d. Primary herpes gingivostomatitis e. Herpetiform aphthous ulcers