It is contact and non-selective herbicide.

Correct option is C

Paraquat is a contact herbicide that is non-selective, meaning it affects a wide range of plants.
· It works by disrupting photosynthesis in the cells, leading to the death of the plant tissues it contacts.
· Paraquat is typically used to control weeds in various crops but must be handled with care due to its toxicity.
Explanation:
· (a) Atrazine – Atrazine is a selective herbicide primarily used in the control of broadleaf and grassy weeds in crops like corn. It works as a systemic herbicide, affecting the plant systemically after it is absorbed through the roots or leaves, rather than a contact herbicide.
· (b) Glyphosate – Glyphosate is a systemic herbicide that works by inhibiting an enzyme needed for plant growth. It is widely used to control a broad spectrum of weeds, but it is not a contact herbicide.
· (c) Paraquat – Correct answer. Paraquat is a contact, non-selective herbicide. It kills the plants it comes into contact with by disrupting their photosynthesis process.
· (d) Pendimethalin – Pendimethalin is a pre-emergence herbicide used to control annual grasses and some broadleaf weeds. It is selective and works by inhibiting cell division, and is not a contact herbicide.