ICAR – Indian Institute of Weed Science is located at

Correct option is C

The Indian Institute of Weed Science was established to conduct focused research on weeds and their management in agricultural crops. It functions under the Indian Council of Agricultural Research (ICAR) and works on developing effective weed control technologies. The institute is situated at Jabalpur in Madhya Pradesh, which represents major cropping systems of central India. Therefore, the correct location of ICAR–Indian Institute of Weed Science is Jabalpur.
Information booster: ICAR–IIWS is the nodal research institute in India exclusively dedicated to weed science and weed management research. The institute conducts studies on integrated weed management, herbicide resistance, and invasive weed species. It supports national programmes by providing scientific inputs, training, and policy guidance related to weed control. The location at Jabalpur enables research relevant to diverse agro-climatic conditions and major field crops.
Why other options are incorrect: (a) New Delhi hosts ICAR headquarters but not the Indian Institute of Weed Science. (b) Kolkata is not associated with the establishment or functioning of ICAR–IIWS. (d) Bikaner does not house any ICAR institute related to weed science.