Which of the following flowers is commonly known as Marigold?

The flower commonly known as Marigold is Tagetes. This genus is well-known for its vibrant blooms and is often utilized in gardens for their bright colors and pest-repelling properties. Marigolds are typically characterized by their distinctive pom-pom shaped flowers and come in various shades of yellow, orange, and red.

Their popularity in horticulture extends beyond aesthetics; they are often used in companion planting as they can deter nematodes and certain pests from harming vegetables and other flowers. Tagetes plants are also appreciated for their relatively easy care and long blooming season, making them a favorite among gardeners.

The other options, such as Viola, Pansy, and Chrysanthemum, refer to different types of flowers. Violas and pansies belong to a different genus altogether and are known for their heart-shaped leaves and wide variety of colors, while chrysanthemums are distinguished by their bushy form and can have a range of flower shapes. Each of these flowers has its own unique characteristics and uses in horticulture, but they do not share the common name Marigold with Tagetes.