A unicellular animal $P$ having no fixed shape ingests a food particle by forming temporary finger-like projections $Q$. The food particle is engulfed with a little surrounding water to form a temporary stomach $R$ inside it. The chemicals $S$ from surrounding cytoplasm enter into $R$ and break down food into small and soluble molecules by chemical reactions. The digested food is absorbed directly into cytoplasm by the process $T$. The undigested food is thrown out of the body by the rupture of a cell membrane $U$ in a process called $V$.
$(a)$ Name the unicellular animal $P$.
$(b)$ What are $(i)$ $Q$, and (ii) $R$?
$(c)$ Name $(i)$ chemical $S$, and (ii) process $T$.
$(d)$ Name $(i)$ organelle $U$, and (ii) process $V$.

• A
  $A$
• B
  $B$
• C
  $C$
• D
  $D$