Quellung reaction is associated with -
Capsular degeneration
Capsular delineation
Capsular absence
Lecithinase production
Ans. is 'b' i.e., Capsular delineation A suspension of pneumococci is mixed on a slide with a drop of the type specific antiserum and methylene blue. On the presence of homologous antiserum capsule becomes apparently swollen, sharply delineated and refractile.