निम्नलिखित में से राज्यों का कौन सा समूह तापी नदी बेसिन का हिस्सा है?

Which of the following rivers is NOT a tributary of the Ganga?

Into which of the following water bodies do the Tapi and Narmada Rivers drain?

Which river flows through the Bardhaman Division and is vital for the agricultural productivity of the region?