The number of six-membered and five-membered rings present in norethindrone (a synthetic progesterone) are respectively:

Which of the following is the most important biological molecule containing $Mg$ found in living organisms?

Which element among the following is not present in saccharin?

Acquired immune deficiency syndrome $(AIDS)$ is characterized by:

Number of compounds from the following which will not produce orange red precipitate with Benedict's solution is $..............$. Glucose,maltose,sucrose,ribose,$2$-deoxyribose,amylose,lactose.

Which of the following does not reduce Fehling's solution?