KBC Offline Quiz September 21: Which of the following is the rootless plant? 

Lemna

Sweet Potato

Ginger

Carrot

Answer: Lemna

Lemna is a genus of free-floating aquatic plants which are rootless. They are more commonly known as "duckweeds". Lemna plants have found use as a model system for studies in community ecology, basic plant biology, ecotoxicology and production of biopharmaceuticals. It is also a source of animal feed for agriculture and aquaculture. 

The other questions asked on KBC Offline Quiz September 21 are: 

KBC 13: Who was the most worshipped God in the Rigvedic period?

KBC 13: Which country has recently signed an MoU with the International Energy Agency, for strengthening...?

KBC 13: Which city is known as the Electronic City of India?

KBC 13: Who was the first man to die in Hindu mythology?

KBC 13: What is the title of the 2003 novel by Monica Ali about the Bangladeshi community in London?

KBC 13: Which existing bird has the largest wingspan?

KBC 13: Which of the following is the rootless plant?

KBC 13: In which part of India is Lug Valley situated?

KBC 13: Who among the following has given the concept of Human Development?

KBC 13: Dolphin kick is associated with which sport?