## Question 1
What is the output if the following input is given?

Bus routes = [[4, 2, 12], [3, 26], [1, 10], [4, 26, 6]]

`src` = 3

`dest` = 12
### Options

1. 2
Incorrect

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2. 3
Correct
Start with a bus at station 3 and go to station 26. Take the bus from station 26 to station 4, and finally, take another bus from station 4 to station 12.
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3. 4
Incorrect

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4. -1
Incorrect

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## Question 2
What is the output if the following input is given?

Bus routes = [[5, 8, 1, 4], [7, 4], [9, 3, 2]]


`src` = 1

`dest` = 3
### Options

1. 2
Incorrect

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2. 3
Incorrect

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3. 4
Incorrect

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4. -1
Correct
There is no route from 1 to 3.
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## Question 3
What is the output if the following input is given?

Bus routes = [[4, 7, 9], [6, 8, 9]]

`src` = 4

`dest` = 8
### Options

1. 1
Incorrect

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2. 2
Correct
Start with a bus at station 4, and take it to station 9. Finally, take another bus from station 9 to station 8.
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3. 3
Incorrect

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4. -1
Incorrect

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