जब कोई अनुसंधान समस्या एक विषम (heterogeneous) जनसंख्या से संबंधित होती है, तो सबसे उपयुक्त नमूनाकरण (sampling) विधि कौन सी है?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?