Rule 1. If two different singular nouns express one idea, the verb should be in the singular form.
Ex.- Bread and milk is good for Breakfast.
Rice and curry is my favorite dish.
This is the long and the short of the matter.
2. When two singular subjects are practically synonymous, the verb should be in the singular form.
Ex.- The law and order situation in the state is under control.
His power and influence is on the decline.
Power and position has no charm for my friend.
Peace and Prosperity is the need to the day.
3. If two singular subjects combined by AND are preceded by each or every, the verb should be in
the singular.
Ex.- Every boy and girl was present in the class Yesterday.
Every man and every woman has the right to express his or her view.