Which of the following is not a genetically modified plant?

The correct option is B Pusa Swarnim
Pusa swarnim is a hybrid variety of brassica.
A hybrid plant is the result of cross-pollinating two different plant varieties and growing the seed the cross produces. The plant that grows from that seed is considered a hybrid.
It has a very high degree of drought tolerance and observes immune reaction against white rust disease. Severity of Alternaria blight disease is reported to be low in this variety.
Bt-cotton, falvr savr tomato and golden rice are genetically modified plants.
GM crops are made through a process known as genetic engineering. Genes of commercial interest are transferred from one plant to another.