निम्नलिखित में से किस भौतिक राशि का न तो कोई मात्रक होता है और न ही कोई विमा होती है?

Which of the following organizations was instrumental in advocating for the abolition of Sati in India?

Who was the first President of independent India?

Who among the following was the founder of the 'Gadar Party'?