in case of a disagreement between the two Houses of Parliament over a non-money bill, the President may call a joint sitting of both the Houses to consider it.

So, the correct answer is:

(C) the President may call a joint sitting of both the Houses to consider it.

Aravali is the oldest mountain range in the geographical structure of India which is about 870 million years old.

A flexible tube called an endoscope is used to view different parts of the digestive tract. When passed through the mouth (as shown on the left), an endoscope can be used to examine the esophagus, stomach, and some of the small intestine.