The correct option is B Ventral muscular and massive foot
Gastropods are one of the most diverse groups of animals, in form, habit and habitat. They are the largest group of molluscs with more than 62,000 described living species and they comprise 80% of the molluscs. They possess a ventral foot and they have a well-defined head with two or four sensory tentacles with eyes. So, the correct answer is option A.