Which pair of structures are usually found in both plant and animal cells?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Motile bacteria	$(P)$ Slime layer
$(2)$ Glycocalyx	$(Q)$ Ribosomes
$(3)$ Gas vacuole	$(R)$ Flagellin protein
$(4)$ $20 \, nm$ diameter	$(S)$ Autotrophic bacteria

Read the following statements and identify the correct option:
$(A)$ Prokaryotic cells lack a nuclear membrane,chloroplasts,mitochondria,microtubules,and pili.
$(B)$ Eukaryotic cells contain a nuclear membrane,chloroplasts,mitochondria,microtubules,and pili.
$(C)$ Many bacterial cells have small circular $DNA$ outside the genomic $DNA$.

In the given figure,what do the parts labeled '$a$' and '$b$' represent respectively?

Which of the following statements are incorrect?
$(i)$ Plant cells have centrioles which are absent in almost all animal cells.
$(ii)$ Ribosomes are the site of protein synthesis.
$(iii)$ The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
$(iv)$ In animal cells, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements:

Which of the following is absent in an animal cell?