निम्नलिखित पारिस्थितिकी वैज्ञानिकों में से किसने 1942 में पोषण स्तरों के बीच ऊर्जा स्थानांतरण का '10% का नियम' प्रस्तावित किया था?

Who among the following founded the 'Forward Bloc'?

Which of the following statements regarding the Harappan Civilization is NOT correct?

Which ruler is generally credited with unifying much of Northern India under a single empire for the first time?