Explanation:

All statements are correct.
Lantana

• A decade-long initiative in Madhya Pradesh to reclaim land overrun by lantana helps has made the residents to restart agriculture and restore native biodiversity recently.

• Lantana is a heavily branched shrub that can grow as compact clumps, dense thickets and as a scrambling and climbing vine.

• The stems are square with small, recurved prickles along the edges.

• Leaves grow opposite one another along the stem.

• Many lantana forms are poisonous to livestock and it is one of the 10 worst invasive species in the world.

• It is an invasive species that is not native to India which was introduced in the country as an ornamental plant by the British.

• Toxic components – In lantana include the triterpene acids, lantadene A (rehmannic acid), lantadene B and their reduced forms.

• Keeping lantana at bay requires consistent management.

• Grazon Extra – Is a chemical that is best used for elimination of lanatana.

• Best time to treat – Is from December through to April, although if conditions allow treatment can be as early as October or as late as July.

• Lantana should be sprayed when the plant is actively growing. This usually occurs between December and April.

Hence option 3rd is correct.