Besides the nucleus,eukaryotic cells have other membrane-bound distinct structures called organelles. Which one is odd according to the given statement?

Which cell organelle is described by the following statements?
$(A)$ Granular structure.
$(B)$ First observed under an electron microscope as dense particles by $George\, Palade$.
$(C)$ Composed of $RNA$ and proteins.
$(D)$ Not surrounded by any membrane.

Ribosomes are the site for which process?

During protein synthesis,which organelle does each $t-RNA$ bring specific amino acids to,after picking them up from the cytoplasm?

An organelle devoid of a membrane covering is

'Palade granules' are