निग्रोइड (Negroid) प्रजाति ऐतिहासिक रूप से निम्नलिखित में से किस महाद्वीप की मूल निवासी 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?