Clearly outline what differentiates Gram +ve bacteria from Gram -ve bacteria?​

Gram positive bacteria have cell walls composed of thick layers of peptidoglycan. Gram positive cells stain purple when subjected to a Gram stain procedure. Gram negative bacteria have cell walls with a thin layer of peptidoglycan.

the answer to your question is b

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;