Replace the question mark with the number below given a simple math problem.

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

I am white when I am dirty, and black when I am clean. What am I?

Can you count the number of triangles in the given figure?

What is the relationship between these matchstick pictures below?

Which alphabet letter is a question?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

What will you call your mother's brother's brother-in-law?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4