Which among the following schedules of Indian constitution talks about the allocation of Seats in Rajya Sabha?

In which schedule of the Indian Constitution all the officially recognized languages in India is mentioned? 

Octane number is a measure of the quality of 

Which date is known as ' Diabetes Day? 

Which one of the following is also known as ' wood spirit’s? 

Alternating current is converted to direct current – 

What is the decibel level of sound produced by two persons in conversation? 

Who amongst the following was the writer of the play ‘Nil Darpan’ which highlighted the plight of the Indigo Farmers?