The correct option is A A-1, B-2, C-3, D-4
Sea lemons are sluggish marine molluscs. Doris is commonly called as sea lemon or sea slug.
Mytilus is a cosmopolitan genus of medium to large-sized edible, mainly saltwater mussels which are widely as food and used in marine-culture.
Garden snail is the common name of Helix.
Limax is commonly known as grey slug which belongs to the family Limacidae.