BPSC – Combined Competitive Examination · প্রশ্ন 141
Which class of immunoglobulin is the first to be produced in response to an infection?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (C) IgM
ব্যাখ্যা
IgM appears first after exposure; IgG follows and gives long-term protection.
- (A) ভুল
Wrong: IgG dominates later (secondary) responses.
- (B) ভুল
Wrong: IgA protects mucosal surfaces.
- (C) সঠিক
Correct: IgM (a pentamer) is the first antibody made in a primary response.
- (D) ভুল
Wrong: IgE is involved in allergy and parasites.